First and foremost, stop smoking. Nicotine is a vasoconstrictor that causes the blood vessels to constrict and increase blood flow. This, in turn, increases sweat production. Second, exercise regularly. Although we don’t know for sure why some people sweat more than others (it could be genetics or some other factor not yet discovered), it doesn’t hurt to try exercising as often as you can handle so you can help prevent those unwanted moisture stains on your shirt. Third , you may want to consider using an antiperspirant deodorant . It contains aluminum chloride and potassium chlorates which help block pores and reduce underarm wetness by forming a protective layer of chloride ions around the skin cells which prevents them from absorbing water through osmosis. And fourth —if all else fails—you might want to visit a doctor who specializes in anti-sweat medications such as Alpha-blockers/Antihistamines or Antipsychotics like Zyprexa (although there are many concerns with this medication). But remember…For every step forward we take, we must learn how far back we’ve been pushed!