Metal allergy is mainly caused by wearing metal jewelry or contact with metal objects and allergic reactions, metal surface will do electroplating treatment, and the main component of electroplating is nickel salt, which can trigger the corresponding allergic inflammatory manifestations, clinical symptoms can appear in the contact area of clear-cut edematous erythema, there can be corn grain size papules, papules, some rashes can be fused into a piece, after scratching After scratching, vesicles and oozing with itching may also appear. In clinical treatment, anti-allergic treatment is required, and oral levocetirizine hydrochloride granules with compound glycopyrrolate capsules can be taken. If the condition is serious, it can be replaced by the injection of compound glycyrrhizin to strengthen the anti-allergy, immunomodulatory and anti-itch treatment effect.