There are more drugs for treating skin allergies, divided into oral, topical and sedative drugs, etc. The common ones are mainly for anti-allergic and anti-inflammatory effects, but the use of drugs, to play their maximum therapeutic role, needs to depend on the symptoms and performance of skin allergies. If in the acute stage, when there are more water and blisters, anti-allergic drugs such as loratadine and cetirizine can be taken orally, and if necessary, glucocorticoid treatment can be best administered orally. However, if the local rash is erythematous and papular, topical treatment with hormonal drugs is the best, but such drugs should not be used for a long time in a large area, and when itching is obvious, anti-itch drops can be used for rubbing, so that local treatment is less harmful to the body. Knowing what drugs or food you are allergic to and avoiding further contact is the best way to prevent it. Eat a light diet, do not eat spicy foods such as chili, hot pot, fish and shrimp, seafood, and drink more water.