A red and itchy patch on the face may be a localized allergic dermatitis. The cause of allergic dermatitis may be the ingestion or inhalation of certain allergens, or local contact with certain substances, resulting in allergy. So, at this time, you can apply topical anti-allergy drugs, you can apply topical clofibrate cream, hydrocortisone butyrate cream or mometasone furoate cream. At the same time, you can take oral antihistamines to stop itching, you can take oral cyproheptadine or levocetirizine hydrochloride, etc., all can be done. However, if the symptoms on the face are caused by fungal infection, it may also be accompanied by scaling on the basis of local erythema, along with itching symptoms, then you can apply topical compound ketoconazole cream, and at the same time need to take oral antihistamines to stop itching.