Neck redness and itching may be caused by contact dermatitis, insect bite dermatitis, urticaria and other factors.
1. Contact dermatitis: local skin contact with animals, plants, leather and other exogenous substances in the neck may lead to the appearance of contact dermatitis, lesions mainly occur in the contact area, the scope of lesions and the area of contact with the substance is probably the same, in the contact area there can be obvious erythema, edema, dense pimples, etc., the patient is often self-conscious of the itchy, burning, swelling and pain.
2. Insect bite dermatitis: it is a localized skin allergic and inflammatory reaction that occurs after being bitten by insects such as mites, cryptocoryne, fleas, etc., which is manifested as a sudden onset of pea- to fingertip-sized erythema, often with severe itching.
3. Urticaria: due to cold, sun exposure, contact with allergens and other factors, resulting in a limited edema reaction of the skin, manifesting itself as a lumpy elevation of varying sizes, bright red or pale white, accompanied by significant itching.
Neck redness and itching may also be caused by other factors, it is recommended that patients seek medical attention in a timely manner in order to clarify the cause of the disease, targeted treatment.