The length of time of keeping needles is closely related to the deficiency, cold and heat of the disease, in the surface, in the inside, the new disease, the long time disease, and the strength of the body, etc. It is appropriate to keep the needles for 20-30 minutes in general; for some acute diseases such as biliary colic, etc., it is necessary to keep the needles for a long time, as little as 1-2 hours, or even longer. The interval between each treatment of acupuncture, usually, acute diseases are treated once or twice a day, but for some diseases that need to be controlled as early as possible, such as acute diseases, severe pain, etc., it is necessary to have acupuncture twice a day or once every 5~6 hours; chronic diseases are treated once every other day or twice a week; the interval between treatments, usually 7~10 days for 1 course of treatment, rest 3~4 days. Acupuncture is a professional invasive operation, need to be in a formal medical institution by a professional physician after diagnosis and treatment before operation, do not operate on your own, so as not to cause adverse consequences, life-threatening.