I have had the hardest time finding a deoderant that didn't make me flare, but I finally did and wanted to share! It's Dr. Clark Zinc Deoderant, and the only ingredients are zinc and water. It works fairly well, not perfect, but so much better than nothing at all. I was changing my shirts four times a day even in the winter, but the last couple of days using this deoderant, I haven't had to change my shirt. As the weather gets warmer, I will probably need to reapply it in the afternoon/evening, but I can totally deal with that. I got the all clear on this deoderant from Dr. M, but you should check with your doc before you try it.

http://www.amazon.com/Dr-Clark-Dr-Zinc-Rollon/dp/B0043BLW5E/ref=sr_1_1?i...