hyperhidrosis
"Sounds very dramatic, but it has literally changed my life. No more sweaty palms. It's definitely caused my armpits to sweat less, but it hasn't completely stopped that yet.  Be aware that you have to apply it every single night (at least at first) and it causes itching and redness, and if you use it on your hands, they will be very dry.  However, it's a very small price to pay because it really does stop sweating. For me, it took about 1 1/2-2 weeks before my hands completely stopped sweating, but there was noticeable difference the next day.  Worth every penny."