Allergic rashes after sunbathing can be treated by doing a good job of general treatment, medication and other ways of treatment. 1. General treatment: sun exposure can cause skin allergic reactions, the first thing to avoid direct contact with the sun, so go out to do a good job of sun protection, with a good hat, umbrella, sunscreen and so on. 2. Medication: Oral antihistamine drugs such as loratadine, through the inhibition of histamine H1 receptors to play an anti-allergic effect. Topical glucocorticosteroids such as hydrocortisone butyrate ointment, calcium-modulated phosphatase inhibitors such as tacrolimus ointment, etc., with anti-inflammatory, antipruritic, and promote the role of the rash to subside. Allergic rash after sun exposure is recommended to go to the hospital as soon as possible, under the guidance of the doctor active treatment, the use of drugs need to follow the doctor’s instructions.