Itchy red rash on the neck should be treated according to the specific cause, such as contact dermatitis, eczema, hives, etc. After a clear diagnosis, choose general treatment, medication and other ways. 1. Contact dermatitis: the neck comes into contact with allergens or irritating substances, inducing an inflammatory reaction that leads to an itchy rash on the neck. Treatment first needs to avoid the causative substances, and then with antihistamines, such as loratadine, cetirizine, to improve the symptoms. 2. Eczema: Eczema can also lead to the phenomenon of itchy neck rashes, it is recommended to improve the itching of the external use of glycerine lotion, and with glucocorticosteroids such as dinexed cream, halomethasone cream for external use. 3. Urticaria: Urticaria can also lead to edematous skin erythema and bullae, resulting in an itchy rash on the neck. Treatment can choose ebastine tablets, loratadine and other antihistamines to improve the symptoms. There are many reasons for the itchy red rash on the neck, and it is recommended to go to the hospital in time after the symptoms appear, and choose standardized treatment after clarifying the factors, and not to treat it indiscriminately, so as not to lead to adverse consequences.