I have a reoccuring rash on the back of my neck. it happens at night, and even in the ac the area is very hot. i assume from sweat and the way my neck touches the pillow. the strange part is that it cannot be my pillow because i have brought it on vacatio

Doctor can examine: Rashes are hard to describe in words. Usually, a doctor has to look at a rash to see what it might be. For common rashes such as eczema, mild reactions to plants or chemicals, excessive dryness, or little itchy bumps, over-the-counter Hydrocortisone 1% cream two or three times a day for 1 week, usually helps. Sometimes rashes start for no obvious reason, and then continue, especially if scratched.