The correct location of the Blood Sea point is in the anterior femoral area, 2 inches above the inner upper edge of the patella, at the elevation of the medial femoral (inner thigh) muscle. The Blood Sea point belongs to the Foot Taiyin Spleen meridian, and is located in the anterior femoral area when the knee is bent, 2 inches above the inner upper edge of the patella, at the elevation of the medial femoral muscle. It has the effect of tonifying Blood and regulating menstruation, clearing heat and inducing dampness (removing heat and dampness from the body). 1. Clinically, it is often combined with Fengchi and Hegu points to treat urticaria, eczema and other hot skin diseases. 2. Combined with Sanyinjiao and Yinbai points, it relieves gynecological diseases such as dysmenorrhea, menstrual closure and irregular menstruation. 3. According to the principle of proximity treatment of acupuncture, combining with other points around the knee joint can treat medial knee and femoral pain. Acupuncture operation has a certain degree of danger, need to be operated by a doctor, if the body has discomfort, as soon as possible to seek medical treatment, not blindly operate on their own, so as not to cause harm to the body.