The location of the San Zeng point is two equal parts of the elbow transverse stripe, and three stitches are taken in a row parallel to the elbow transverse stripe at a point just below it. The San Zeng point is not a single point, but is a combination of the Mu Zeng, Tu Zeng and Shui Zeng points, which are 0.5 inch below the Qu Ze, Shak Ze and Shao Hai points respectively. It has the effect of clearing the head and eyes, clearing the channels and relieving pain (dredging the channels and collaterals and relieving pain), and is the main treatment for disorders related to the skull and the brain, and is therefore commonly used for neurological headaches, insufficient blood supply to the brain, or dizziness and headaches caused by high blood pressure. In addition, the San Ding point can also relieve lesions around the eyes, such as optic nerve atrophy, cataracts, and presbyopia, and can also be used with other points for better results. If you need acupuncture, please visit a hospital and have it performed by a professional doctor, not by yourself.