My skin under my arms has become REALLY sensitive. I used to use Arrid, but was starting to develop a rash. I switched to Tom's, but it caused rashes for me, too. I use Arm & Hammer now. I used Arrid yesterday - just because I thought maybe the rashes were due to something else, but I ended up with welts, swelling and redness in about a 6 inch area. YIKES! Super itchy and yuck. Took 2 Benadryl before bed last night and most of the swelling is gone, although the redness is still there. I've gone back to A&H, although I also just use powder sometimes if it is just me and I'm staying home. I am going to try the Crystal, though. I've never heard of that - must have missed the last post. Thanks for posting on this topic!

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Kim