The causes of itchy skin after sun exposure are skin damage, skin allergy, etc., as follows: 1. skin damage: after UV exposure the skin will be dry and dehydrated, so itchiness will occur; 2. skin allergy: after UV exposure the skin barrier is damaged, producing a large number of allergenic substances that can cause an allergic reaction to the skin, which is common in clinical practice in solar dermatitis, which can You can see erythema and papules on the skin exposed to UV rays, accompanied by itching, and in severe cases, peeling. You can tell the patient to go to a shady place and apply a cold wet compress with ice, and then apply topical glyburide lotion, or choose a mixture of mometasone furoate cream and urea vitamin E cream for external use, and if the patient has severe itching, you can also take oral compound glycopyrrolate tablets and olopatadine hydrochloride tablets, and at the same time, when you go out in the hot summer, the patient must pay attention to sun protection, you can apply sunscreen or barrier cream. Therefore, for itchy skin after sunbathing, patients can be advised to go to a regular hospital and under the guidance of a dermatologist for appropriate clinical treatment.