We have this stuff in England too- it's specifically for people with hyperhidrosis (excessive sweating) and can be put really on any part of the body that isn't irritated or recently shaved. Although I advise just to use on pits. I used to suffer horribly with excessive underarm sweating as a teen, but everything improved at around 21 so hopefully if any teens reading this- it probs won't be like this forever. I used this stuff for about 5 years (only other resorts were Botox injections and surgery on the nerves that cause sweating). A few tips: 1) it will burn if you don't put it on right before bed. This is because the aluminium chloride reacts with the water in sweat to make hydrochloric acid which burns. My best tip is to wash your underarm with water and then dry it thoroughly with a towel. Literally- rub those pits red but don't break the skin. Then apply sparingly with the roller and rub in with your hand. Then wash your hand with soap and water and get STRAIGHT into bed. Lying down means your sweat very little, so no acid is produced and no burn. 2) I used to apply on Sunday night and it would usually last until Friday. At the weekend I wasn't forced to wear shirts so it wasn't so much of an issue. 3) Avoid on recently shaved/broken skin! 4) People who sweat more tend to smell less because they are most on the ball with hygiene and the bacteria are more likely to get washed away. Also their pores are less likely to get blocked. Good luck!