Suggest Treatment For An Itchy Rash-like Patch On The Back Of Neck

Every now and then I get an itchy rash-like patch at the base of the back of my neck. I sometimes think it's related to me having been rubbing my neck, but I cannot always correlate neck pain with the onset. I don't have a fever, or any other symptoms that I'm aware of. I can't recall coming into contact with anything that might irritate it. I do have a history of cervical discectomy and fusion (anterior) at C 5-6, 10 years ago, and sometimes get stinging and burning in the area, presumably from nerve pain. As I mentioned it isn't painful, just itchy and sensitive if I scratch it.