RESUMEN
The incidence of septic postparten sacroilitis is low, described in the literature cases are less than 20 in number. CLINICAL CASE: It is about a girl 17 years and 9 months,transported to OG Clinic at University Hospital "St. George" 10 days after a normal vaginal delivery, with complaints of fever and debilitating hip pain in left gluteal area. Streptococcus pyogenes was isolated as in the culture of lochial secretions, as well as in the tested blood culture. The data obtained from completed development. The patient was subjected to a total of 6 weeks of antibiotic therapy. Conclusion Timely diagnosis of the condition is challenging because of its nonspecific clinical manifestations. Septic sacroilitis should be considered in the differential diagnosis when all women in puerperium, presenting with disablina hip pain and fever.