The redness and swelling of skin allergy can subside in 2-3 days if it is fast, or more than a month if it is slow. It can be treated with oral and topical medications, such as antihistamine drugs like Levocetirizine Hydrochloride, Chlorpheniramine Maleate, Loratadine Citrate, Loratadine Capsules, Olopatadine Hydrochloride, or Epinastine Hydrochloride. In addition to this, you can also take oral compound glycyrrhizin capsules as well as topical medications such as fluticasone propionate, dieldrin ointment, mometasone furoate ointment, and hydrocortisone butyrate ointment as glucocorticosteroids. If the skin allergy occurs on the face, topical zinc oxide boric acid ointment, black bean distillate, or a calcium-modulated phosphatase inhibitor such as 0.03% tacrolimus ointment can be used.