The reason for bleeding water from cupping may be that the cupping site has been operated by needling before cupping, or the skin is broken because the cupping time is too long. 1. Clinical treatment is often used in conjunction with acupuncture and canning, if the needle operation is carried out first, there will be a needle hole after starting the needle, cupping on the site, because of the negative pressure in the can, there will be a small amount of blood from the needle out of the place, but the amount of bleeding is relatively small, and it can be used to press with a dry cotton ball after starting the cupping. 2. Cupping time is too long: because the skin is delicate, if the physician cupping operation time is too long may cause the rupture of subcutaneous capillaries, thus appearing cupping bleeding water, sometimes accompanied by blisters. If the patient has cupping bleeding water, it is recommended that the patient reflect to the operating doctor in time to deal with the situation.