Arm allergies, red spots can be oral or topical drugs, and life adjustments, as follows: 1, oral drugs: such as levocetirizine hydrochloride capsules, loratadine capsules, dicloretidine capsules, dicloretidine beriberi capsules, olopatadine hydrochloride tablets, epristinum hydrochloride capsules and other antihistamines, as well as compound glycyrrhizic acid capsules; 2, topical drugs: such as butylphenylhydroxyacid ointment, butyl flufenamic acid Ointment and other anti-inflammatory, anti-allergic non-steroidal ointment, can also be used hydrocortisone butyrate ointment, Dinaid ointment, mometasone furoate cream and other glucocorticosteroid ointment; 3, life adjustments: to avoid prolonged exposure to the sun, the need to wear cotton, white clothes, can not wear synthetic fiber clothing. Avoid hot water scalding, can not use salt water, alcohol, vinegar essence external washing, external rubbing.