Neck allergy redness and swelling, consider with contact dermatitis, urticaria and other diseases, can be controlled by local medication and systemic medication and so on. 1. Contact dermatitis: neck contact allergens or irritants can appear localized redness and swelling, in the acute phase of the local cold wet compresses, such as boric acid solution to reduce exudation. When the exudate is reduced, hydrocortisone butyrate ointment, mometasone furoate gel and other medications can be used externally; when accompanied by itching, antihistamines such as cetirizine can be taken orally. 2. Urticaria: there may be edematous erythema of the neck and wind masses. Local glycerine lotion can be used to stop itching, can also be used to stop itching emulsion such as benzylamine cream treatment; oral drugs should be selected antihistamines such as loratadine, ebastine and other treatments. Neck allergy red swelling, it is recommended to consult a doctor in a timely manner, in accordance with the doctor’s instructions standardized medication.