If you have a rash on your neck and it is itchy, you should treat it according to the cause, as follows: 1. If you have a rash on your neck and it is itchy, it may be caused by allergies, and you can take oral anti-allergy drugs accordingly in the treatment, which can play the role of anti-itch and anti-allergy. If the rash has obvious red spots, papules, papules, etc., you can take oral second-generation antihistamines, such as Epstein, or oral loratadine, which can play an anti-allergic and eliminate the effect of the rash. 2, if the rash is caused by infection, for example, some people may have folliculitis, according to the specific type of folliculitis, oral antibiotic products, such as appropriate oral roxithromycin, topical application of Fusidic acid cream, etc.