i have that problem too. ive seen a vascular surgeon about a sympathectomy [cutting the sweat glands] and he doesnt think its a good idea as it will make the rest of my body sweat even more. thats if i had my face hands and feet done. now im thinking i should get my hands done. it gets worse every year. i now have to keep my hands off my clothes now otherwise i end up with a big handprint! and because we have more salt in our sweat my head gets all salt crusties, not a good look. there is a anti perspirant in australia called dri-clor. im not sure if its under the same name in the US. its just a deoderant with a VERY high amount of aluminium in it. ive had to stop using it though, as my skin has become very sensitive to it. it only worked under my arms anyway. i dont think the actual sweating is cf related, but the fact our sweat is thick and salty makes matters worse, eg your sweat doesnt evaporate as well as others.treatment available is iotonpheresis, dri-clor, surgery or certain types of medication. ive heard there is a low success rate with the meds and they can cause bad side effects. by the way iotonpheresis is where they place your foot in a bucket of water with an electrode, your hand to be treated on some cotton which has been placed in a special solution, this is then placed on another electrode and an electrical current is passed through your body. its perfectly safe, but it caused my hands to itch like hell. its also a big inconvenience. it has to be done several times a week at first and the sessions take up to 45 minutes!