Dr Oz said that it is not normal to only sweat out of one armpit, but it may not be a health issue either. Everyone is built asymmetrically and so sometimes our sweat glands are asymmetric as well. If you sweat too much, a doctor can clip the nerves or do botox to help with the amount of sweat your armpit produces. The bigger concern would be if you used to sweat out of both armpits and then suddenly only started sweating out of one armpit, because that could mean that something is growing and pushing on your nerve – so you should then go to the doctor and get a chest xray. I wonder how common this really is. Leave a comment below if you only sweat out of one armpit!