Itchy face when it is hot, may be caused by solar dermatitis, eczema, corn rashes and other causes, patients can be relieved through general treatment, medication and other ways to alleviate the condition. 1. Solar dermatitis: patients with solar dermatitis should stay away from sunburned environments, do a good job of protecting themselves from the sun when they go out, and replenish water and electrolytes appropriately to avoid recurrence of the condition. Patients can use glycerine lotion, hydrocortisone cream and other drugs for local treatment under the guidance of the doctor. 2. Eczema: patients should avoid violent scratching and excessive wiping of the face, and prohibit the consumption of seafood, alcohol, chili peppers and other stimulating foods. Can be used under the guidance of a doctor to use topical medication, common drugs are glycerine lotion, hydrocortisone cream, mometasone furoate ointment, etc., can also be taken orally loratadine and other antihistamine drugs for treatment. 3. Corn Rash: Corn Rash is also known as prickly heat, patients should keep the skin dry and clean, wear loose clothing, avoid scratching with hands, and the room should be cool and ventilated. Topical medications, such as glycerin lotion and ichthyol glycerin lotion, can be used under the guidance of a doctor. If the face is itchy when it is hot, it is recommended to consult the hospital in time, clarify the cause of the disease under the guidance of the doctor, and carry out targeted treatment.