Generally, the tendency toward excessive sweating (aka hyperhidrosis) is an inherited trait, but it can also come on suddenly.
SWITCH YOUR DEODORANT Start using an over-the-counter, clinical-strength antiperspirant twice a day.
SEE AN M.D. "A doctor can prescribe a pill to reduce sweating [Robinul, an anticholinergic] to be taken daily or before a big event," says Westley. "She can also make sure there is no issue with your thyroid, other hormonal conditions, or diabetes."
CONSIDER BOTOX "Injections can make a big difference for underarms, palms, and soles, reducing sweating by 75 percent, with results lasting up to six months."