The efficacy and function of the eight evil points are to pass the pain (dredge the meridians, relieve pain), clear heat and detoxification (remove heat and poison in the body), etc., these eight points complement each other, and work together in the human body. 1. Channeling pain: Eight Evil Points are located on the back of the hand, for the meridian outside the point, in the 1st to 5th finger, the finger web edge behind the red and white flesh between the left and right a total of eight acupuncture points, acupuncture can be used to treat or regulate the numbness of the fingers, the back of the hand swelling and pain, especially cervical spondylosis caused by numbness of the fingers, flexion and extension of the fingers are unfavorable. 2. Clearing heat and removing toxins: Acupuncture at this point can also clear heat and release heat, which can be used to treat high fever, eye redness and swelling, hand and back pain, sore throat, irritability, etc. In addition, if the eight evil acupuncture points are punctured and bloodletting is also commonly used to alleviate the fever caused by convulsions, epilepsy. The operation of the acupuncture points needs to be carried out by specialized doctors.