Itchy sun exposure is usually caused by solar dermatitis and polymorphic sun rash. 1. solar dermatitis usually belongs to the category of atopic dermatitis, because the patient suddenly exposed to prolonged or relatively strong sun exposure caused by inflammation, manifested as erythema, edema, blisters, hyperpigmentation, flaking, itching and other symptoms, which appeared in the sun on the body very itchy phenomenon. 2. polymorphic solar rash is usually due to idiopathic, recurrent, polymorphic lesions characterized by common photosensitive skin diseases, the performance of the exposure site for papules, papules, edematous erythema, plaques, itching and other symptoms, thus appearing in the sun on the body is very itchy phenomenon. Itchy body in the sun, first of all, to avoid sun exposure, it is recommended to consult a doctor to determine the cause of the disease, in general, under the guidance of a doctor through desensitization drugs such as loratadine or glucocorticoid cream such as Dinaid cream treatment, the use of medication need to comply with the doctor’s instructions, do not self-medication.