I have a rash on the back of my neck and a smaller on my neck. It is itchy, red, painful, and looks like cottage cheese. It's been there 3 days. Calamine Lotion gives me some comfort but the rash has not deminished at all.
Very well could be allergic reaction to medication, soap, etc. Put some antibotic cream on it and keep checking, if it doesn't clear in a week or so or gets worse please see a doctor. Don't scratch it.