Re: Armpit Burns from Deodorant

 I just don't understand why suddenly I'd become sensitive to it? I mean yesterday my pits were FINE with it!

It is hard to say without more information.  Allergies can come and go. Or maybe something from your diet got excreted in your sweat from diet that interacted with it. Maybe the deodorant stick got contaminated with something. This is a common reason for breakouts from cosmetics. If the surface was wet and then capped preventing it from drying out this could have caused excessive microbial growth.