Wear necklace allergy itch consider is contact dermatitis, patients can be treated by general treatment, applying drugs, oral medication and other methods. 1. General treatment: you need to remove the necklace in time, do allergen testing, identify the allergens, and avoid contact with such allergic substances again in life. Do not scratch the itchy area excessively, so as not to break the skin of the area to appear infected. 2. Apply drugs: you can apply glycerin lotion on the itchy area to relieve itching, if there is obvious red rash or intense itching, you can also apply hydrocortisone cream, dexamethasone acetate cream and other drugs. 3. Oral medication: If the itching is more serious, you can also take antihistamines to relieve the symptoms, commonly used drugs are avastin, loratadine, imipramine, cetirizine and so on. It is recommended that patients seek medical treatment in a timely manner, in accordance with the doctor’s prescription medication.