I recently developed an odd rash a couple days ago after a trip to the Caribbean. I think first got it around my mouth which has become very dry and itchy lately but when I came back to the States a worse form of the rash developed on my collarbone and spread to my neck and underneath my chin. Normally I wouldn't worry too much, but the little bumps and redness are visible and it stings and becomes irritated when something touches it or when I sweat. I don't remember doing anything that would really irritate my skin this much. I tanned a lot in the sun and got just a bit of sunburn but it went away after a day or so. I haven't been using any new products on my skin either. I don't know if its just because the skin is dry because it stung when I put lotion and vaseline on it to soothe it.....