Neck itch after scratching like scraping red may be due to artificial urticaria, allergic purpura, contact dermatitis and other diseases.
1. Artificial urticaria: usually due to external mechanical stimulation, caused by the skin, mucous membrane vascular permeability increases, the skin produces a windy streak-like elevation, may lead to the neck itch, after scratching like scraping red.
2. allergic purpura: the etiology of the disease is not known, may be related to infection, genetics and other factors, the onset of vascular permeability, brittleness increases, more prone to rupture, and then scratching, the skin may appear bleeding points, dark purple patches, etc., which may lead to the neck itchy, scratching like gua sha as red.
3. Contact dermatitis: the skin due to contact with allergens, such as metal necklaces, cleaning agents, etc., so that in the contact area of the local allergic reaction, manifested as erythema, papules, pimples, etc., which may lead to the neck itchy, scratching like Gua Sha like red.
In addition to the above reasons, thrombocytopenic purpura, psoriasis, etc. may also cause neck itching and scratching like gua sha like red, it is recommended that patients with this symptom go to the regular hospital in a timely manner, under the guidance of the doctor to find out the cause of the disease, and comply with the doctor’s instructions for treatment.