Blisters from cupping may be related to the individual’s physical condition, the time of cupping, and so on. Consult your doctor for specific reasons. 1. Individual constitution: living in a humid environment for a long time or poor dietary habits, such as eating cold and cold food, may cause weakness of the spleen and stomach, and the transportation of water will be affected, resulting in heavy dampness, which will make blisters appear more easily during cupping. 2. Cupping time: If the cupping time is long, blisters may also appear, generally the cupping time is 10-15 minutes. After cupping blisters, blisters are small and can be absorbed on their own, if they are large, ulceration, inflammation and other conditions should be timely medical treatment.