The four suture acupuncture and bloodletting refers to the acupuncture of the four suture points for bloodletting, and the best time can be chosen in the morning or at noon. It is located on the palm surface of the 2nd-5th fingers, in the center of the 1st-2nd transverse lines, and is connected to the five meridians of the large intestine, pericardium, Sanjiao, heart and small intestine. The depth of needling depends on the patient’s age, condition and physical condition. Four suture acupuncture and bloodletting has the effects of strengthening the spleen and moving qi, activating blood circulation and relieving pain, regulating the balance of yin and yang, improving immunity, eliminating food stagnation, dispelling phlegm and resolving stagnation, and is mainly used to treat indigestion, cold and cough, arthritis of the fingers, insomnia, gout and menstrual disorders. When using the four suture acupuncture bloodletting, if the patient is in a position to do so, he can choose to do it in the morning or at noon, so that the yang energy is more abundant at that time. In addition, if the patient has a bleeding tendency or a blood disorder, he must not needle the four suture points when the four suture needles are used for bloodletting.