Swelling of skin after cupping is likely to be caused by excessive negative pressure in the cupping can or leaving the can for a long time, which is a normal physiological phenomenon and can be relieved by itself; it may also be due to pathologic factors, such as skin allergy, which can be treated with general therapy or medication. 1. Physiological factors: under normal circumstances, cupping can promote the circulation of human qi and blood, if the negative pressure in the can is too large or the time spent in the can is too long, it will lead to stagnation of qi and blood, unable to circulate, the qi and blood run poorly, affecting the normal functional activities, the excess qi and blood will be gathered together to form a lump, so the phenomenon of localized swelling of the skin. Symptoms can be relieved by applying cold compresses with ice within 24 hours and hot towels to the swollen skin area after 24 hours. When the general treatment effect is not good, you can choose to apply diclofenac sodium, wintergreen oil and other drugs. 2. Pathological factors: due to direct contact between the can mouth and the skin, skin irritation leads to increased immune response, skin allergies caused by localized swelling, can be externally smeared with Dinocap, mometasone furoate and other drugs for treatment to alleviate the swelling. If the skin has not been swollen after self-adjustment, you should go to the hospital in time to do a detailed examination, do not take it lightly, so as not to further aggravate the condition.