[Discussion on the theory of he-sea point in Neijing (Inner Canon of Yellow Emperor) and Nanjing (Yellow Emperor's Classic of Eighty-one Difficult Issues )].

By collecting and analyzing the explanation/conception, acupoint name, acupoint location, indications, acupuncture and moxibustion techniques and contraindications of he-sea point recorded in Neijing (Inner Canon of Yellow Emperor) and Nanjing (Yellow Emperor 's Classic of Eighty-one Difficult Issues), it is found that conception of he-sea point of five-shu points has been specifically formed, the names of he-sea points of eleven meridians, the locations and the ways to locate them were recorded. But, the summaries relevant to the indications of the many he-sea points have not been included in teaching materials, thus, it needs to be further analyzed. The acupuncture-moxibustion techniques at he-sea point are flexible and the attention should be paid to distinguish "needling he-sea point in autumn" from "needling he-sea point in winter". Besides, the consideration should be given on coma/fainting induced by arterial bleeding when needling he-sea point, as well as the joint motor impairment caused by over deep insertion in acupuncture.