I came across a girl in her twenties who was having this problem with sweaty palms. Her hands were literally dripping with sweat so that she never shake hands with people as it was too embarassing.

She decided to try some supplements and after a few months her condition improved a lot.
So before resorting to surgery why not try another alternative.
She took the multivitamin/mineral/antioxidant, Bio Omega 3 and grape seed extract.