The benefit of bloodletting at the root of the tongue is that it can be used for emergency resuscitation, and it has a great role in adjusting the vascular diseases that occur in the human body, especially when there are chronic blood clots and insufficient blood supply. In addition, for some blood stasis caused by insomnia, hyperthyroidism, dizziness, lightheadedness, peripheral weakness, elevated blood pressure, etc., have auxiliary therapeutic effects. Bloodletting at the root of the tongue mainly targets two directions: First, it stimulates the central nervous system of the human brain, which can regulate the nervous state of the human body. Second, bloodletting at the root of the tongue can improve blood vessels, stimulate the human body to produce a stress response, can be discharged as soon as possible the garbage in the blood vessels, so that the blood lipids are adjusted, so that cerebral vasospasm has been improved, the blood flow, cardio-cerebral and cerebral vascular diseases can play a preventive and therapeutic role.