The treatment of redness, itching and dryness after face allergy depends on the cause, if the allergy occurs after using skin care products or masks on the face or without any reason, manifesting as redness, burning, itching, dryness and tightness of the skin, first of all, apply a wet solution externally, using lead acetate solution, boric acid solution or sodium chloride solution, or even cool boiled water, wetting medical gauze and compressing the redness for half an hour each time. Half an hour, and then apply topical medical skin care products to repair the skin barrier function after compressing. Next, you can take oral anti-allergy medications, such as levocetirizine tablets, lupatadine tablets, olopatadine tablets, etc. Without hypertension, you can also take oral glycopyrrolate tablets. If it is accompanied by redness and swollen eyelids or facial swelling, you can take spironolactone tablets to reduce the swelling. And during this period of time, you should stop using any external skin care products and cosmetics, and then do not wash your face in water that is too hot, and do not eat certain hair products.