First of all, I don’t use deoderant because it causes me problems, I use shower to shower type powder. Last night I came down with red burning armpit, mainly under one armpit, but slightly in the other. Sorry about grossness of this, but it does smell slightly like yeast, not like regular underarm oder. My first thought is that it might be yeast infection, but all that I’ve read so far says that it’s itchy. This is not itchy. Just very painful, red, and slightly sticky to touch. Anyone know what this might be, and could it be treated without going to doctor.