Something dreadful has happened - I think I've developed an allergy to a fragrance ingredient of some sort.
A couple of weeks ago, I started getting some itchy blotches on my chest, in the area where I usually spray fragrances. I stopped spraying on my skin for a while, and stuck to just a spray on my shirt each day, and the skin irritation went away.
Then yesterday I applied one spray of Rive Gauche PH on my chest, and 12 hours later I had an itchy red area exactly where I'd sprayed - RG is one of my favourites, and I've recently bought a backup while the aluminum cans are still available cheaply
Today I've sprayed Bleu de Chanel on a different area of my chest, and I'll see how that goes - I guess I need to narrow it down and try to identify the offending ingredient.