Blood release from the four sutures has the effect of eliminating chancre and resolving accumulation and relieving cough, and can be used to treat pediatric chancre (a chronic disease of children manifested by emaciation, abnormal diet, abdominal distension, thinning and yellowing of hair, etc.) and whooping cough. There are four points on each hand, located on the proximal side of the palmar surface of the 2nd to 5th fingers, in the center of the interphalangeal joints. The method of operation is to puncture and bleed or to squeeze out a small amount of clear, yellowish mucus. Before puncturing, push, squeeze, knead and stroke around the four suture points to make the local area congested and then sterilized. The puncture should be secured with a staking hand, and the stabbing hand should be aimed at the four suture points and quickly stabbed in and out, and then a small amount of bleeding should be squeezed out, and then a sterile dry cotton ball should be used to press on the needle hole. Patients who feel unwell are advised to consult a doctor in time. The operation of puncture and bloodletting is risky and should be carried out by a professional doctor.