Blisters on the body are medically known as blisters, which may be due to viral infections, allergies, autoimmune diseases, etc. They can be treated by medication and physical therapy. 1. Viral infections: including herpes zoster, herpes simplex and other diseases, can be treated with antiviral drugs such as acyclovir and bromvudine, short-term use of glucocorticosteroids such as prednisone in the acute stage, and pain-relieving and anti-inflammatory drugs such as acetaminophen. 2. Allergy: Allergy may lead to erythema, blisters, etc., accompanied by local itching and other manifestations. It can be treated with antihistamines such as loratadine and immunosuppressants such as cyclosporine. 3. Autoimmune disease: abnormal autoimmune function may lead to herpetic disease, with skin blisters as the main manifestation. Cytotoxic drugs such as cyclophosphamide and sulfonamides such as sulfasalazine can be used for treatment. If necessary, combine with physical therapy such as red light to promote anti-inflammatory. Drugs need to be used under the guidance of clinicians, prohibit unauthorized use of drugs; the appearance of blisters, it is recommended to go to the hospital in a timely manner.