Ok so lately (exactly 3 times) I have gotten these weird blister-like sores in my armpits. Twice in my left armpit and once in my right. At first it hurts when anything touches it then it becomes something like a blister and contains fluid. A little bit later it will pop because the skin holding in the fluid is so thin then it's just like exposed raw skin. The whole time that this happens it is very red and hurts a lot. It is not because of my bra. Does anyone know what this is? Could it be the result of my deodorant? About 2 months ago I switched from Secret stick deodorant to Dove dry spray deodorant. Could this be the cause? Does it have something to do with the fact that it's aerosol? The one on my right armpit did not form into a blister it was just like a sore but both in my left armpit became blister things. They lasted not more than 2 days and did not leave a scar. Also when I got them it was one at a time and a few days or so apart they came one by one. Any ideas of what this is. I have only started to get the sores towards the end of the second month that I had used the deodorant but I was not using it everyday.