QUESTION REGARDING HEALTH...?

MY SISTER IS 25 YRS OF AGE... SHE HAS A PROBLEM OF SWEATING... SHE'S VERY VERY THIN, SHE SWEATS FROM HER PALM VERY BADLY EVERY NOW & THEN... IT BECOMES A PROBLEM FOR HER WHEN SHE'S AT A PARTY... BECAUSE OF THAT SHE DOES NOT DANCE WITH ANYONE SPECIALLY WALTZ OR ANY OTHER BALLROOM DANCE...IS THERE ANY MEDICINE OR SOMETHING FOR THIS?? BCOZ WE HAVE A FAMILY PARTY COMING UP IN 5 DAYS...