Itchy skin in summer may be caused by environmental factors, solar dermatitis, allergies and other reasons. 1. Environmental factors: may be due to the summer low humidity, high temperature and other causes of skin dryness, so that the skin itch. 2. Solar dermatitis: it is a kind of skin inflammation caused by sunlight irradiation, and the exposed parts of the patient’s skin may have symptoms such as erythema, itching, swelling, blisters, etc., and in serious cases, even vesicles may appear. 3. Allergy: It may be due to allergy to some kind of pollen, dust mite, ultraviolet light in summer, and the body’s immune response, which can appear itchy skin phenomenon. It is recommended that patients with itchy skin in summer go to the hospital in time and follow the doctor’s instructions for treatment to avoid delaying the condition.