It is a very sensitive point, also known as a meridian point, and its main location is at the tip of the finger 0.1 inch from the free edge of the nail, with a total of 10 left and right points, known as the Ten Xuan points. It is a very painful point in clinical practice, and can be used to treat coma, shock, heat stroke, mental illness, convulsions, cerebral hemorrhage, stroke induced disorders of consciousness, hypertension, insomnia, and numbness of the fingers by acupuncture and bloodletting. The simplest way to stimulate the Xuan points is to repeatedly pinch them with the fingernails to the main soreness, which is ideal for the treatment of chronic diseases, neurasthenia, and difficulty sleeping.