Cupping is usually suitable at night, when the human body regulates the balance of yin and yang, and you can have a proper rest after cupping. Cupping is the use of heat or other methods to exclude the air in the tank to form negative pressure, so that the tank adsorbed on the surface of the body to cause localized bruising, so as to achieve the effect of activating the meridians and collaterals, promoting qi and blood (to promote the operation of the gas so that the circulation of blood), dispelling wind and dispersing cold (to dispel the wind evil, dispel the evil of cold) and so on. Cupping is generally not divided into time, cupping can also be done at night, because the rest time is longer at night, so after cupping can have enough rest, which will also help the state of the next day. However, cupping time should not be too late, so as not to affect the normal sleep after cupping. After cupping, you should pay attention to keep warm, avoid cold and wind, do not take a bath immediately, cupping time should not be too long, if discomfort occurs when cupping, it is recommended to stop in time and seek medical attention. It is necessary to be operated by a professional physician, do not unauthorized cupping, in order to avoid adverse consequences.