If you like guessing which celebrities have had Botox treatment, check out their armpits at awards ceremonies and see who's staying dry. Botox isn't just smoothing out the wrinkles these days, it's doing away with ugly sweat stains.

Botox treatment for sweating typically involves about 12 small injections to each armpit. The best sites for the injections are identified by swabbing the armpits with iodine and dusting them with powder to see which areas are the sweatiest. The needle doesn't go deep and the pain is likened to the discomfort of plucking eyebrows. The toxin blocks messages from the nerves to the sweat glands. So even if the nerves are telling the glands to release sweat, they don't respond.

The injections knock out enough sweat glands to get rid of embarrassment, but leave sufficient working to ensure that normal sweating continues. Intriguingly, there is evidence to suggest that Botox reduces body odour too, but no one is quite sure why.

So if you have been invited to receive your Golden Globe this year, you might consider a trip to the plastic surgeon first.