After fire cupping, there may be hazards such as catching cold easily, skin damage and infection. 1. Easily catching cold: after cupping, due to local pore expansion, when there is no good protection against wind and cold, such as underdressing, immediate bathing, etc., it is easy to catch cold, which may lead to fever, sneezing, runny nose and other symptoms. 2. Skin damage: after cupping, due to excessive negative pressure effect, local skin may lead to subcutaneous muscle relaxation, bruising and so on. At the same time, if the operation is not careful or personal physical factors, it may also cause skin burns, blisters and other symptoms. 3. Infection: In the process of cupping, if the negative pressure effect is too large, it may lead to local skin congestion, broken capillaries and other symptoms of blisters. And it is also easy to break, resulting in skin infection. If the above symptoms appear after fire cupping, you should go to the hospital in time and take active treatment under the guidance of the doctor.