Botox is known for its ability to treat wrinkles in your skin but there are some studies that have found a new way to use this unique product. Botox can also be used to control excessive underarm sweat and the effects can last up to two years. This embarrassing condition is known as axillary hyperhidrosis in the medical field. People with axillary hyperhidrosis (excessive underarm sweat) sweat up to four ...