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One of theories explaining the development of long-lasting symptoms after an acute severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection include changes in the methylation pattern of the host. The current study aimed to investigate whether DNA methylation levels associated with the angiotensin-converting enzyme 2 (ACE2) promoter are different when comparing individuals previously hospitalized due to COVID-19 who then developed long-lasting post-COVID pain with those previously hospitalized due to COVID-19 who did not develop post-COVID-19 pain symptoms. Non-stimulated saliva samples were obtained from a cohort of 279 (mean age: 56.5, SD: 13.0 years old, 51.5% male) COVID-19 survivors who needed hospitalization. Clinical data were collected from hospital medical records. Participants were asked to disclose pain symptoms developed during the first three months after hospital admission due to COVID-19 and persisting at the time of the interview. Methylations of five CpG dinucleotides in the ACE2 promoter were quantified (as percentages). Participants were evaluated up to 17.8 (SD: 5.3) months after hospitalization. Thus, 39.1% of patients exhibited post-COVID-19 pain. Most patients (77.05%) in the cohort developed localized post-COVID-19 pain. Headache and pain in the lower extremity were experienced by 29.4% of the patients. Seven patients received a post-infection diagnosis of fibromyalgia based on the presence of widespread pain characteristics (11.6%) and other associated symptoms. No significant differences in methylation percentages at any CpG location of the ACE2 promoter were identified when comparing individuals with and without post-COVID-19 pain. The current study did not observe differences in methylation levels of the ACE2 promoter depending on the presence or absence of long-lasting post-COVID-19 pain symptoms in individuals who needed hospitalization due to COVID-19 during the first wave of the pandemic.
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It is known that SARS-CoV-2 can translocate via membrane ACE2 exopeptidase into the host cells, and thus hypomethylation of ACE2 possibly upregulates its expression, enhancing the risk of SARS-CoV-2 infection. This study investigated if DNA methylation levels of the ACE2 promoter are associated with the development of post-COVID-19 symptomatology in a cohort of COVID-19 survivors who had been previously hospitalized. Non-stimulated saliva samples were obtained from 279 (51.5 male, mean age: 56.5 ± 13.0 years old) COVID-19 survivors who were hospitalized during the first wave of the pandemic. A face-to-face interview in which patients described the presence of post-COVID-19 symptoms (defined as a symptom that started no later than three months after SARS-CoV-2 infection) that they suffered from to an experienced healthcare trainer was conducted. Methylation of five CpG dinucleotides in the ACE2 promoter was quantified using bisulfite pyrosequencing. The percentage of methylation (%) was associated with the presence of the following reported post-COVID-19 symptoms: fatigue, dyspnea at rest, dyspnea at exertion, brain fog, memory loss, concentration loss, or gastrointestinal problems. Participants were assessed a mean of 17.8 (SD: 5.3) months after hospitalization. At that time, 88.1% of the patients experienced at least one post-COVID-19 symptom (mean number for each patient: 3.0; SD: 1.9 post-COVID-19 symptoms). Dyspnea at exertion (67.3%), fatigue (62.3%), and memory loss (31.2%) were the most frequent post-COVID-19 symptoms in the sample. Overall, the analysis did not reveal any difference in the methylation of the ACE2 promoter in any of the CpG locations according to the presence or absence of fatigue, dyspnea at rest, dyspnea at exertion, memory loss, brain fog, concentration loss, and gastrointestinal problems. This study did not find an association between methylation of ACE2 promoter and the presence of post-COVID-19 fatigue, dyspnea, cognitive or gastrointestinal problems in previously hospitalized COVID-19 survivors.
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Chronic kidney disease (CKD) has considerable effects on the quality of life of female patients. Receiving the diagnosis and beginning renal replacement therapy (RRT) has a great personal impact on patients. The purpose of this study was to describe the experience of female patients with CKD at an ambulatory dialysis unit regarding diagnosis, life changes, and initiation of RRT. A qualitative exploratory study was conducted based on a social contructivism framework. Participants were recruited using purposeful sampling. In total, 18 women who received treatment for CKD with RRT were included. The women were attending the Ambulatory Dialysis Unit at a hospital belonging to the public health system of Madrid (Spain). Unstructured and semi-structured in-depth interviews, researchers' field notes, and women's personal letters were used. A systematic text condensation analysis was performed. The criteria used to control trustworthiness were credibility, transferability, dependability, and confirmability. Two themes emerged from the data: (a) A turning point in their lives, and (b) The emotional journey of beginning RRT. The diagnosis of CKD and the beginning of treatment implies changing routines and adapting to a new life with CKD. The first dialysis and puncture of the arteriovenous fistula is a major experience. Support from other CKD patients with more experience is perceived as a necessity and a tool to share their experiences and resolve doubts among peers. The diagnosis and initiation of RRT leads to numerous changes in the lives of women with CKD, which may influence the acceptance of treatment.
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Taste and smell disorders are common symptoms of SARS-CoV-2 acute infection. In post-COVID-19 condition, symptoms can persist leading to disruption in patients' lives, to changes in their coping skills, and to the need to develop strategies for everyday life. This study aimed to describe the perspective of a group of patients with Long-COVID-19, a condition where loss of taste and/or smell was the most predominant symptom. A qualitative descriptive study was conducted. Participants who had suffered SARS-CoV-2 infection and had Long-COVID-19 loss of taste and/or smell were recruited. Purposive sampling was applied, and participants were recruited until data redundancy was reached. In-depth interviews were used for data collection and thematic analysis was applied. Twelve COVID-19 survivors (75% women) were recruited. The mean age of the participants was 55 years, and the mean duration of post-COVID-19 symptoms was 25 months. Three themes were identified: (a) Living with taste and smell disorders, describing the disorders they experience on a daily basis, how their life has changed and the accompanying emotions, (b) Changes and challenges resulting from the loss of taste and smell, changes in habits, self-care and risk in certain jobs or daily activities, (c) Coping with taste and smell disorders, describing the daily strategies used and the health care received. In conclusion, Long-COVID-19 taste and/or smell disorders limit daily life and involve changes in habits, meal preparation, and the ability to detect potentially dangerous situations.
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Fibromyalgia (FM) is a chronic pain syndrome hypothesized to arise from a state of neurogenic inflammation. Mechanisms responsible for pain, as well as psychological variables, are typically altered in this condition. The main objective of this research was to explore somatosensory and psychological alterations in women with FM. The secondary objective was to carry out a secondary analysis to correlate the different variables studied and delve into the influences between them. The relationship between different psychological variables in fibromyalgia is not clear in the previous scientific literature. Forty-four individuals participated, of which twenty-two were controls and twenty-two were women with fibromyalgia. The main outcome measures were the Numeric Pain Rating Scale, Fibromyalgia Impact Questionnaire, pressure pain threshold, conditioned pain modulation, anxiety and depression symptoms, catastrophizing and kinesiophobia cognitions. The main analysis showed that there is a moderate correlation between the psychological variables of depression and fear of movement and the ability to modulate pain. There is also a moderately inverse correlation between pain catastrophizing cognitions and pain intensity/disability. Multiple moderate and strong correlations were found among the various psychological variables studied. FM patients exhibit somatosensory alterations alongside negative psychological symptoms that influence the experience of pain, and they may perpetuate the state of neurogenic inflammation.
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The aim of this study was to identify the association between four selected inflammatory polymorphisms with the development of long-term post-COVID symptoms in subjects who had been hospitalized due to SARS-CoV-2 infection during the first wave of the pandemic. These polymorphisms were selected as they are associated with severe COVID-19 disease and cytokine storm, so they could be important to prognoses post-COVID. A total of 408 (48.5% female, age: 58.5 ± 14.0 years) previously hospitalized COVID-19 survivors participated. The three potential genotypes of the following four single-nucleotide polymorphisms, IL-6 rs1800796, IL-10 rs1800896, TNF-α rs1800629, and IFITM3 rs12252, were obtained from non-stimulated saliva samples of the participants. The participants were asked to self-report the presence of any post-COVID symptoms (defined as symptoms that had started no later than one month after SARS-CoV-2 acute infection) and whether the symptoms persisted at the time of the study. At the time of the study (mean: 15.6, SD: 5.6 months after discharge), 89.4% of patients reported at least one post-COVID symptom (mean number of symptoms: 3.0; SD: 1.7). Fatigue (69.3%), pain (40.9%), and memory loss (27.2%) were the most prevalent post-COVID symptoms in the total sample. Overall, no differences in the post-COVID symptoms depending on the IL-6 rs1800796, IL-10 rs1800896, TNF-α rs1800629, and IFITM3 rs12252 genotypes were seen. The four SNPs assessed, albeit having been previously associated with inflammation and COVID-19 severity, did not cause a predisposition to the development of post-COVID symptoms in the previously hospitalized COVID-19 survivors.
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COVID-19 , Factor de Necrosis Tumoral alfa , Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , COVID-19/genética , Interleucina-10/genética , Interleucina-6/genética , Proteínas de la Membrana/genética , Polimorfismo de Nucleótido Simple , Proteínas de Unión al ARN/genética , SARS-CoV-2/genética , Factor de Necrosis Tumoral alfa/genéticaRESUMEN
BACKGROUND: Carpal tunnel syndrome (CTS) may lead to significant work limitations, especially in female manual workers. There is scarce evidence on the perspective of female manual workers with CTS. PURPOSE: To explore the perspective of female workers who suffer from CTS regarding triggers, coping strategies, and economic impact. STUDY DESIGN: A qualitative phenomenological study was conducted involving 18 manual workers with CTS diagnosed by the neurology service of a public hospital. METHODS: Purposive sampling was applied, and data were collected using in-depth interviews and researchers' notes. An inductive thematic analysis was applied to identify themes reflecting the participants' experience. Guba and Lincoln criteria were applied to establish the trustworthiness of the data. RESULTS: The mean age of participants was 40.06 years (SD 9.86). Four themes were identified: (a) coping with work limitations; (b) work activities that aggravate symptoms; (c) relationships at work; and (d) the economic burden of CTS. The effect of work on CTS, daily constraints, work situations that trigger the symptoms, and the strategies used by participants to adapt to their work are described. In addition, they recounted how relationships with managers and coworkers are modified and how CTS affects family finances. CONCLUSIONS: The findings describe aggravating factors among working women, coping strategies used, and the social and occupational impact of CTS.
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Síndrome del Túnel Carpiano , Humanos , Femenino , Adulto , Síndrome del Túnel Carpiano/diagnóstico , Habilidades de Afrontamiento , Lugar de Trabajo , Proyectos de Investigación , Factores de RiesgoRESUMEN
The role of genetics as a predisposing factor related to an increased risk of developing long COVID symptomatology is under debate. The aim of the current secondary analysis was to identify the association between the Apolipoprotein E (ApoE) gene, a gene affecting cholesterol metabolism and previously associated with a higher risk of SARS-CoV-2 infection and COVID-19 severity, and the development of long COVID in a cohort of individuals who had been hospitalized by SARS-CoV-2 infection. Unstimulated whole saliva samples were collected from 287 previously hospitalized COVID-19 survivors. Three genotypes of the ApoE gene (ApoE ε2, ε3, ε4) were obtained based on the combination of ApoE rs429358 and ApoE rs7412 polymorphisms. Participants were asked to self-report the presence of any post-COVID symptom in a face-to-face interview at 17.8 ± 5.2 months after hospital discharge and medical records were obtained. Each participant reported 3.0 (1.9) post-COVID symptoms. Overall, no significant differences in long COVID symptoms were observed depending on the ApoE genotype (ApoE ε2, ApoE ε3, ApoE ε4). The presence of the ApoE ε4 genotype, albeit associated with a higher risk of SARS-CoV-2 infection and COVID-19 severity, did not appear to predispose for the presence of long COVID in our cohort of previously hospitalized COVID-19 survivors.
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Apolipoproteínas E , COVID-19 , Síndrome Post Agudo de COVID-19 , Humanos , Apolipoproteína E2/genética , Apolipoproteína E4/genética , Apolipoproteínas E/genética , COVID-19/genética , Genotipo , Síndrome Post Agudo de COVID-19/genética , SARS-CoV-2RESUMEN
The aim of the study was to identify the association between four selected COVID-19 polymorphisms of ACE2 and TMPRSS2 receptors genes with the presence of long-COVID symptomatology in COVID-19 survivors. These genes were selected as they associate with the entry of the SARS-CoV-2 virus into the cells, so polymorphisms could be important for the prognoses of long-COVID symptoms. Two hundred and ninety-three (n = 293, 49.5% female, mean age: 55.6 ± 12.9 years) individuals who had been previously hospitalized due to COVID-19 were included. Three potential genotypes of the following single nucleotide polymorphisms (SNPs) were obtained from non-stimulated saliva samples of participants: ACE2 (rs2285666), ACE2 (rs2074192), TMPRSS2 (rs12329760), TMPRSS2 (rs2070788). Participants were asked to self-report the presence of any post-COVID defined as a symptom that started no later than one month after SARS-CoV-2 acute infection and whether the symptom persisted at the time of the study. At the time of the study (mean: 17.8, SD: 5.2 months after hospital discharge), 87.7% patients reported at least one symptom. Fatigue (62.8%), pain (39.9%) or memory loss (32.1%) were the most prevalent post-COVID symptoms. Overall, no differences in long-COVID symptoms were dependent on ACE2 rs2285666, ACE2 rs2074192, TMPRSS2 rs12329760, or TMPRSS2 rs2070788 genotypes. The four SNPs assessed, albeit previously associated with COVID-19 severity, do not predispose for developing long-COVID symptoms in people who were previously hospitalized due to COVID-19 during the first wave of the pandemic.
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COVID-19 , Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Enzima Convertidora de Angiotensina 2/genética , COVID-19/genética , Peptidil-Dipeptidasa A/genética , Polimorfismo de Nucleótido Simple , SARS-CoV-2 , Serina Endopeptidasas/genética , Sobrevivientes , Síndrome Post Agudo de COVID-19RESUMEN
Objective: To investigate the association of different, selected pain polymorphisms with the presence of de novo long-COVID pain symptoms and to analyze the association between these polymorphisms with clinical, sensory-related, cognitive and psychological variables in COVID-19 survivors. Methods: Two hundred and ninety-three (n = 293, 49.5% female, mean age: 55.6 ± 12.9 years) previously hospitalized COVID-19 survivors participated. Three genotypes of the following single nucleotide polymorphisms (SNPs) were obtained from non-stimulated saliva: OPRM1 (rs1799971), COMT (rs4680), BDNF (rs6265), and HTR1B (rs6296) by polymerase chain reactions in all participants. Further, clinical (intensity/duration of pain), sensory-related (sensitization-associated symptoms, neuropathic pain features), psychological (anxiety or depressive levels, sleep quality), and cognitive (catastrophizing, kinesiophobia) variables were collected in those COVID-19 survivors suffering from post-COVID pain. Analyses were carried out to associate clinical features with genotype. Results: Participants were assessed 17.8 ± 5.2 months after hospitalization. One hundred and seventeen (39.9%) experienced post-COVID pain (particularly of musculoskeletal origin). The distributions of the genotype variants of any SNP were not significantly different between COVID-19 survivors with and without long-term post-COVID pain (all, p > 0.178). No differences in sensitization-associated symptoms, neuropathic pain features, catastrophizing, kinesiophobia levels, anxiety and depressive levels or sleep quality according to the genotype variant in any SNPs were found. No effect of gender was identified. Conclusion: The four SNPs generally associated with pain did not appear to predispose to the development of de novo long-COVID pain symptoms in previously hospitalized COVID-19 survivors. The SNPs were not involved in the phenotypic features of post-COVID pain either.
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COVID-19 , Neuralgia , Adulto , Anciano , COVID-19/complicaciones , COVID-19/genética , Femenino , Hospitalización , Humanos , Masculino , Persona de Mediana Edad , Neuralgia/genética , Neuralgia/virología , Fenotipo , Polimorfismo de Nucleótido Simple , Sobrevivientes , Síndrome Post Agudo de COVID-19RESUMEN
UNLABELLED: Alterations in the rs4680 Val158Met polymorphism are associated with the presence of pain. No study has investigated the role of Val158Met polymorphism in the susceptibility to exhibit pain in multiple sclerosis (MS). Our aim was to investigate the relationship between Val158Met polymorphism (rs4680) and the presence of pain in MS. One hundred eight (n = 108) patients (mean age: 44 ± 8 years) with a definitive diagnosis of MS and 108 matched controls participated. Fifty-eight patients (54%) had pain and 50 (46%) did not report pain. After amplifying Val158Met polymorphisms by polymerase chain reactions, rs4680 genotype frequencies and allele distributions were calculated. We classified individuals according to their Val158Met polymorphism: Val/Val, Val/Met, and Met/Met. The results showed that distribution of rs4680 Val158Met genotypes was not significantly different between individuals with MS in general and healthy people (χ2 = 2.212, P = .331). When we differentiate MS patients with pain and those without pain, the prevalence of Val158Met genotypes was significantly different (χ2 = 9,610, P = .046): Patients experiencing pain exhibited higher prevalence of Met/Met genotype than those without pain and healthy controls. Current results suggest that the Met allele of Val158Met polymorphism could be a potential risk factor for the development of pain in MS but not for the predisposition of MS itself. PERSPECTIVE: This study suggests that the Val158Met polymorphism is associated with the presence of pain in MS, but it is not a risk factor for MS itself because the presence of the Met/Met genotype was more prevalent in those patients with pain. This study provides further evidence of potential genetic factors that predispose patients with MS to develop pain.
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Catecol O-Metiltransferasa/genética , Metionina/genética , Esclerosis Múltiple/genética , Dolor/genética , Polimorfismo de Nucleótido Simple/genética , Valina/genética , Adulto , Alelos , Femenino , Predisposición Genética a la Enfermedad/genética , Genotipo , Humanos , Masculino , Persona de Mediana Edad , Esclerosis Múltiple/diagnóstico , Esclerosis Múltiple/enzimología , Dolor/diagnóstico , Dolor/enzimología , Dimensión del Dolor/métodos , Factores de Riesgo , Método Simple CiegoRESUMEN
OBJECTIVES: The purpose of this study is to describe differences in the presence of masseter and temporalis muscle trigger points (TrPs) and jaw opening between individuals with mechanical neck pain and healthy controls. METHODS: Twenty patients with mechanical neck pain (60% women) without symptoms in the orofacial region, aged 20 to 37 years old, and 20 matched controls participated. Temporalis and masseter muscles were examined for the presence of TrPs in a blinded design. Trigger points were considered active if the subject recognized the pain as a familiar symptom, whereas the TrPs was considered latent if the pain was not recognized as a symptom. Jaw opening was assessed with a ruler. RESULTS: A greater number (P < .001) of TrPs in the masticatory muscles were found in patients than in controls. None of the patients or healthy controls recognized the referred pain as familiar; thus, latent rather than active TrPs were found. The distribution of TrPs between groups was different for the masseter (left odds ratio [OR], 3.4; right OR, 8.1; P < .001) and temporalis (left OR, 2.8; right OR, 5.7; P < .001) muscles. Patients with neck pain had smaller jaw opening than controls (P < .001). A negative correlation between active jaw opening and the number of TrPs within the masticatory muscles (r(s) = -0.6; P < .001) was found: the greater the number of TrPs, the smaller the jaw opening. CONCLUSIONS: For the subjects in this study, those with mechanical chronic neck pain had more latent TrPs in the masticatory muscles and reduced jaw opening compared to healthy controls. These findings may suggest the spread of sensitization from the cervical segment to the trigeminal brain stem sensory nuclear complex.
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Dolor Crónico/fisiopatología , Músculos Masticadores/fisiopatología , Dolor de Cuello/fisiopatología , Puntos Disparadores/fisiopatología , Adulto , Estudios de Casos y Controles , Femenino , Humanos , Maxilares/fisiología , Masculino , Dimensión del Dolor , Dolor Referido/fisiopatología , Adulto JovenRESUMEN
UNLABELLED: Our aim was to assess the relationship of the Val158Met polymorphism to pain, anxiety, depression, functional ability, and pressure pain sensitivity in women with fibromyalgia (FMS). One hundred (n = 100) women with FMS diagnosed according to the American College of Rheumatology criteria participated. A numerical pain rate scale (0-10) was used to assess the intensity of pain; the Hospital Anxiety and Depression Scale was calculated to determine anxiety and depression; and functional ability was determined with the Fibromyalgia Impact Questionnaire. Further, pressure pain thresholds (PPTs) were bilaterally assessed over C5-C6 zygapophyseal joints, second metacarpal, and tibialis anterior muscles. Finally, after amplifying Val158Met polymorphisms by polymerase chain reaction, catechol-O-methyltransferase (COMT) genotype was divided into Val/Val, Val/Met, or Met/Met genotypes. Women with FMS with the Met/Met genotype exhibited higher disability (F = 11.836; P < .001), anxiety (F = 13.385; P < .001), and depression (F = 6.931; P = .002) than those with Val/Val and Val/Met genotypes. No differences for the intensity of widespread pain (F = .154; P = .857) and PPT levels over C5-C6 joints (F = 1.014; P = .336), second metacarpal (F = .216; P = .806), and tibialis anterior muscle (F = 1.179; P = .311) were found. Our results suggest that the Val158Met COMT polymorphism modulated some psychological variables but not pressure pain sensitivity in FMS, because women carrying the Met/Met genotype show higher disability, depression, and anxiety but similar PPTs than those with Val/Met or Val/Val genotypes. This study is important because it strives to understand potential genetic factors that predispose some women with FMS to exhibit a more severe phenotypic expression of the disease. Future studies are needed to elucidate potential relevance of the differences. PERSPECTIVE: This study suggests that the Val158Met COMT polymorphism modulated some psychological variables but not pressure pain sensitivity in FMS because women with FMS carrying the Met/Met genotype exhibit higher disability, depression, and anxiety than but similar PPTs to those with Val/Met and Val/Val genotypes. This study provides further evidence of potential genetic factors that predispose women with FMS to exhibit the disease more severely.
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Ansiedad/genética , Ansiedad/psicología , Catecol O-Metiltransferasa/genética , Depresión/genética , Depresión/psicología , Evaluación de la Discapacidad , Fibromialgia/genética , Fibromialgia/psicología , Dimensión del Dolor , Polimorfismo Genético/genética , Adolescente , Adulto , Sustitución de Aminoácidos , Ansiedad/etiología , ADN/genética , Depresión/etiología , Femenino , Genotipo , Humanos , Persona de Mediana Edad , Presión , Escalas de Valoración Psiquiátrica , Encuestas y Cuestionarios , Adulto JovenRESUMEN
OBJECTIVE: The purpose of this prospective case series was to examine the combined effects of soft tissue mobilization and nerve slider neurodynamic technique on pain and pressure sensitivity in women with chronic carpal tunnel syndrome (CTS). METHODS: Eighteen women with a clinical and electromyographic diagnosis of CTS participated. Patients completed the numerical pain rating scale (NPRS) for current, worst, and lowest pain intensity and underwent pain pressure threshold (PPT) testing over the median, radial, and ulnar nerves; the C5-C6 zygapophyseal joint; the carpal tunnel; and the tibialis anterior muscle. Pain was assessed at baseline and 1-week follow-up, whereas PPT were assessed at baseline and immediately after and 1-week after intervention. Each received soft tissue mobilization and nerve slider neurodynamic technique directed at different anatomical sites of potential entrapment of the median nerve. RESULTS: A decrease in the mean current intensity and worst level of hand pain (P<.01) was found 1 week after the treatment session (mean changes, 2.2±1.1 points). A treatment effect for PPT levels over the C5-C6 zygapophyseal joint (P<.001) was found: PPT increased bilaterally 1 week after the intervention. No other significant changes in PPT levels were found (P>.195). CONCLUSIONS: The application of soft tissue mobilization and neurodynamic technique decreased the intensity of pain but did not change pressure pain sensitivity in this group of women with chronic CTS.
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Síndrome del Túnel Carpiano/rehabilitación , Manipulaciones Musculoesqueléticas/métodos , Dimensión del Dolor/métodos , Umbral del Dolor/fisiología , Dolor/prevención & control , Adulto , Análisis de Varianza , Síndrome del Túnel Carpiano/complicaciones , Síndrome del Túnel Carpiano/diagnóstico , Enfermedad Crónica , Estudios de Cohortes , Electromiografía/métodos , Femenino , Humanos , Manipulación Espinal/métodos , Masaje/métodos , Persona de Mediana Edad , Dolor/etiología , Dolor/fisiopatología , Satisfacción del Paciente , Estimulación Física/métodos , Estudios Prospectivos , Índice de Severidad de la Enfermedad , Resultado del TratamientoRESUMEN
INTRODUCTION: The aim was to investigate bilateral, wide-spread pressure pain hyperalgesia in symptomatic (trigeminocervical) and non-symptomatic (pain-free distant) regions in children with frequent episodic tension-type headache (FETTH). METHODS: Twenty-five children, 6 boys and 19 girls (mean age, 8.9 +/- 1.8 years) with FETTH and 50 age- and sex-matched healthy children (12 boys, 38 girls; mean age: 8.8 +/- 1.7 years) were recruited. Pressure pain thresholds (PPTs) were bilaterally assessed over temporalis muscle, upper trapezius muscle, second metacarpal and tibialis anterior muscles in a blinded design. RESULTS: The results showed that PPT levels were significantly decreased bilaterally over the temporalis, upper trapezius and tibialis muscles, and the second metacarpal in children with FETTH as compared to controls (all sites, P < 0.001). No significant differences in the magnitude of PPT decrease between the upper trapezius muscle, second metacarpal and tibialis anterior muscles were found. PPT over both upper trapezius muscles were negatively correlated with the history and intensity of headache (r(s) = -0.415; P = 0.045). CONCLUSIONS: The findings revealed bilateral, wide-spread pressure pain hypersensitivity in children with FETTH suggesting that wide-spread central sensitisation is involved in children with this headache pain condition.