Neck itchy scratch rash may be related to urticaria, insect bite dermatitis, eczema, etc., need to be analyzed according to the specific symptoms. 1. Urticaria: after contact with allergens, causing excessive immune response of the skin, the patient is often suddenly self-conscious of skin itching, soon appeared in the itchy parts of the size of the red red masses, round, oval or irregular, and sometimes the masses can be pale white, the condition of serious people can be accompanied by panic, irritability, and even lower blood pressure and other symptoms of anaphylaxis. 2. Insect bite dermatitis: due to the mosquito bites caused by the perverse reaction, the main clinical manifestations of the bite localized pimples, doughnuts, edematous erythema, blisters and other skin lesions. Often accompanied by varying degrees of itching, tingling and other symptoms. 3. Eczema: inflammation caused by a variety of internal and external factors. Often manifested as erythema on the basis of pinhead to corn size papules, papules, serious cases can appear small blisters and so on. Self-conscious itching is intense, drinking alcohol, scratching, soap washing is aggravated. Neck itchy scratched rash may also have other reasons, it is recommended that the patient timely to the hospital, clear cause, cause treatment.