A red patch on the face that itches and feels crusty can be a case of dermatitis in the area, or it can be a case of limited eczema, or contact dermatitis in the area. When these inflammations occur, there may also be itching, and then as the inflammation continues to develop, there may also be some oozing. While waiting for the oozing to slow down or stop, dry crusting may occur, and then a red and itchy patch on the face with crusting may appear. In this case, anti-allergy treatment is needed, and topical medication can be applied with hydrocortisone butyrate cream. If accompanied by obvious exudation, you can also apply zinc oxide cream, but also need to take oral antihistamines to stop itching, such as second-generation antihistamines: levocetirizine hydrochloride, or ibastine and so on.