Facial itching, the appearance of dense small granular rash, consider allergic dermatitis is very likely, especially need to pay attention to whether it is due to ultraviolet allergy, because in the exposure area of the rash, the first need to rule out whether it is related to ultraviolet rays. Rash can be applied with saline or boric acid solution for wet compresses, and can be treated with topical medications that do not contain glucocorticoids, such as butylhydroxy acid. Intense itching requires oral antihistamine drugs, such as loratadine, cetirizine and so on. At the same time, attention needs to be paid to avoid eating spicy and irritating food, which may lead to intense itching. Avoid contact with alkaline detergents, so as not to damage the skin barrier function. Be sure to pay attention to sun protection, so as not to aggravate the rash. It is best to consult a doctor in time to clarify the diagnosis before treatment with medication, and must follow the doctor’s instructions for regular use of medication, not self-medication.