i had a surgery once. where they removed most my sweat glands in my underarm. i am very sad to say that it didn't work. though i only sweat a little in my underarm still stink. my smell is now fecal, i don't think it's because of the surgery though, but it is not confined in my underarms anymore. if your problem is oversweating it's probably a good idea.
the best thing is to solve this from within. that's what i'm still doing.