Sanyinjiao is located on the inner side of the calf, 3 inches above the tip of the inner ankle, behind the medial border of the tibia. Sanyinjiao is located on the inner side of the lower leg, 3 inches above the tip of the inner ankle and behind the medial border of the shinbone. Sanyinjiao belongs to the spleen meridian of the foot Taiyin, which is effective in strengthening the spleen, promoting dampness, activating blood circulation and regulating menstruation. It can be clinically used for spleen and stomach weakness, such as intestinal tinnitus, abdominal distension and diarrhea; obstetrics and gynecology diseases, such as irregular menstruation, excessive menstruation, etc.; genitourinary disorders, such as spermatorrhea, impotence, and urination; and impotence and paralysis of the lower extremities (lower extremities are weak and weak, numbness and pain), palpitations, insomnia, and so on. The correct location of Sanyinjiao is three inches above the tip of the inner ankle, behind the medial edge of the tibia. Acupuncture or moxibustion treatment for Sanyinjiao should be carried out by a professional acupuncturist, and individuals should not operate on their own, so as not to cause adverse consequences.