Ambulance sirens, clattering dishes, screaming children, music I can't stand (or that I know will get stuck in my head for weeks). I will literally cover my ears and start making sounds to try to block it. Being around intense artificial smells (walk down the air freshener aisle? No thank you!) Sudden noises set off a big startle reflex (which people seem to think is hilarious, but is from childhood trauma, so not funny to me).

A high irritation level can be indicative of a negative mood elevation. Took me awhile to figure that out. Things can vary in intensity with mood shifts, but they're still the same things.

Oh, and screaming. All kinds. And parents screaming at children. I don't consider myself to be an HSP, though I do have some issues. A lot of them stem more from trauma I think.