There are many reasons for blisters to appear on the body and it is important to differentiate between the causes when the above diseases are found and to actively treat them. 1. It is possible that sweat blisters may occur, and if excessive local sweating or body humidity is found, it may lead to blisters on the skin surface with no visible redness around them, accompanied by varying degrees of itching and burning sensation. 2. It is possible that shingles may occur, as viral infections can This is because a viral infection can cause herpes zoster to intensify and cause large blisters on the surface of the skin, which can be treated by applying antiviral creams. 3. It is also possible that ringworm or tinea pedis has occurred, which can cause patients to have blisters on the hands and feet, accompanied by scaling and molting of the skin, and should be treated early by applying antifungal creams to effectively relieve the condition.