Hyperhydrosis, more commonly known as excessive sweating, can significantly affect a person’s quality of life. In some cases, problematic sweating is limited to one area of the body, such as the underarms or feet, a condition called focal hyperhidrosis.
When used to treat underarm excessive sweating, Botox has been shown to result in an 82-87% decrease in sweating. Results start to be noticeable approximately 2 to 4 days after treatment with the full effects usually noted within 2 weeks. Dryness typically lasts 4 to 12 months, but some studies have found it can last as long as 14 months.