weird question but I wanna know the answer

okay ngl this is kinda weird asf, but sometimes when I don't wear a bra with a t shirt (because bras are uncomfortable ASF) my... uh... nips like fucking burn. idk if im having an allergic reaction or if its scratchy fabric, but it HURTS, now I gotta wear bandaids over my tits. so does this happen to y'all too?