Itchy and dry face after sun exposure may be related to solar dermatitis, solar urticaria, polymorphic sun rash and other diseases, which need to be further differential diagnosis by the doctor. 1. Solar dermatitis: strong sun exposure, can cause acute skin inflammation reaction on the face, can appear erythema, with itching, erythema subside with dryness, flaking. In severe cases, there are edema, blisters with burning pain. 2. Solar urticaria: the skin on the face is exposed to ultraviolet rays, itching and clammy skin occurs within 5-10 minutes, which may subside within 24 hours and may be accompanied by dry skin. 3. polymorphic solar rash: photosensitive dermatosis appearing after sun exposure, the face and other exposed parts of the skin within 1 hour of sun exposure, itching, dry skin, a few days after the appearance of erythema, papules and a variety of lesions. It is recommended that the face of the sun after the appearance of itchy and dry people go to the regular hospital in a timely manner, to clarify the cause of the disease, should be standardized treatment under the guidance of the doctor, so as to avoid delays in the condition of the body to bring adverse effects.