I tend to get a splotchy flat red rash on my neck (generally the entire neck sometimes not) and splotches all over my upper chest. It can be triggered by stress etc. but I’ve ruled everything I can think of out and now I have a constant patchy itchy red rash on my collarbone. It isn’t my laundry detergent, food, etc. I’m drawing a blank! It is horribly itchy but lotion doesn’t help. It spreads up to my neck and I have had it for weeks now. I tend to get rashes easily for no apparent reason and antihistamines don’t help. This is the only part of my body that does this. Please help! THANK YOU!!!