Sanyinjiao is an acupoint of the foot Taiyin Spleen meridian, which is the intersection of the three meridians of the foot Taiyin Spleen meridian, the foot Shao Yin Kidney meridian and the foot Convulsive Yin Liver meridian in the lower leg. Sanyinjiao is widely used in clinical practice and has the effect of strengthening the spleen and stomach, tonifying the liver and kidney, nourishing the brain and calming the mind, activating blood circulation and so on, and is an important point for treating stomach and spleen diseases and gynecological diseases. The location and function of Sanyinjiao are as follows: a. Location Sanyinjiao is located on the inner side of the lower leg, at the posterior edge of the tibia, three inches up from the tip of the inner ankle. Patients who are unfamiliar with the location can determine the location by simple acupuncture point method, with the four fingers of the hand together, the lower edge of the little finger immediately above the tip of the inner ankle (the most prominent part of the medial ankle), the intersection of the upper edge of the index finger where the horizontal line and the posterior edge of the tibia, that is, Sanyinjiao, usually pressed will have a soreness and swelling. 2, the role of 1, strengthen the spleen and stomach: for the spleen and stomach weakness, lack of Qi and blood and affect the secretion of milk, resulting in breast laxity women, or have abdominal distension, diarrhea, indigestion, constipation, stomach pain and other gastrointestinal discomfort, you can massage or acupuncture Sanyinjiao; 2, tonic liver and kidney: for dreaming, urinary disorders, dysmenorrhea and other diseases, usually due to the loss of kidney yuan or liver qi stagnation, massage, acupuncture Sanyinjiao has a very good 3, nourish the brain and tranquilize the mind: for patients with stubborn insomnia, menopausal insomnia and other neurasthenia, pressing and acupuncture at Sanyinjiao can play a role in nourishing the brain and tranquilizing the mind, which can alleviate insomnia; 4, activate the blood and open the ligaments: acupuncture and moxibustion Sanyinjiao can be used to treat gouty arthritis, dermatitis, eczema and other diseases. Sanyinjiao is a very important acupuncture point in the human body and has very many roles. It is still recommended that patients go to a Chinese medicine hospital for evidence-based treatment and acupuncture points following the meridians, so as to achieve relief and alleviate discomfort. Note that acupuncture at Sanyinjiao should be contraindicated for pregnant women.