If so, then you might have a condition called axillary hyperhidrosis. This type of sweating can be so extreme that most deodorants arenât enough to control it. Many people wish they knew how to reduce armpit sweating, but itâs not always easy.These remedies are really just the start!ust apply a generous amount of the deodorant on your armpits two or three times a day. You can find home remedies in your kitchen. Apple cider vinegar and lime juice are both known to control sweating. Choose one of these and rub it onto your armpits twice a day.