If cupping is not done properly, the main harm that may be caused is infection, which may trigger wind, cold and dampness to enter the body, leading to side effects such as muscle relaxation. 1. After cupping, there is a certain probability of infection. If cupping can not properly grasp the temperature, it is easy to scald the skin blisters, if not treated in time, it is easy to break, which leads to skin infection. 2. Easily induce some diseases. After cupping, the pores of the skin will open up, if not properly cared for, it is easy to attract evil into the body, such as wind, cold, dampness and other evils will enter the body, thus causing colds and other diseases, and even allergic diseases. 3. It also affects the muscles. Prolonged fire cupping will pull the muscles, resulting in muscle relaxation. Long-term fire cupping may cause muscle strength loss and muscle-related diseases. The frequency of fire cupping should be limited to no more than once a week, and try to wait until the last one has recovered. Do not do fire cupping at home by yourself, but do it under the guidance of a physician to avoid the adverse effects mentioned above.