The middle of the thumb and forefinger is called the tiger’s mouth, which is an important part of the hand. You can’t grip anything without it, and you have to hold things tightly by jamming it. If the tiger’s mouth area is injured, it will seriously affect the grip and the function of the hand, which will seriously affect the life of a person. There is a large acupoint in the tiger’s mouth called the Hegu point, which is positioned with the thumb and the remaining four fingers together, and the highest point of the tiger’s mouth on the back side of the hand is the Hegu point. The main function of the Hegu point is to relieve heat and pain, open the meridians, clear heat and relieve symptoms. It is good for treating headaches, fever, and seizure symptoms such as closed teeth and crooked mouth. Stimulation of the Hegu point by point pressure or acupuncture during treatment can have a good therapeutic effect.