Allergic itchy face should be treated with oral anti-allergy drugs, such as paracetamol, loratadine, etc. Then, according to the characteristics of the allergic rash, choose the appropriate topical medication. If the rash is many and bright red, it is recommended that you can use Furfurylate lotion. If the effect of Furfurylate lotion is not too satisfactory, you can use hydrocortisone butyrate cream. If the surface of the face is broken and scratched, you can use mometasone furoate cream and erythromycin ointment, 1:1 ratio mixed well for external application. In addition, when the immune system is poor, the face is also prone to allergies, so you can take compound glycyrrhizin tablets or vitamin C to improve your immune system.