Hyperhidrosis is the medical term for excessive sweating. It refers to any abnormal sweating, such as sweating when it’s not hot. People who sweat excessively often soak through their clothing or drip sweat. Regular antiperspirants don’t work well for those with this condition. Botox injections are a new treatment option for people with hyperhidrosis. You may be a candidate for Botox if your sweating fails to improve with prescription antiperspirants. Botox has been FDA-approved for people who sweat excessively from their armpits. It may also be used “off-label” to reduce sweating in other areas, such as the hands, feet, and face. Off-label use refers to using a medication for something other than what it was approved to treat. In this case, it means that Botox hasn’t gone through the same amount of rigorous testing to confirm its effectiveness for treating excessive sweating in other areas of the body.