Many women sweat more than usual during puberty and when they have their periods. Washing daily under your arms is the best way to keep the sweat at bay. Make sure that your skin is completely dry before using a deodorant. Use a hairdryer set to blow cold air before applying the deodorant if you have a problem with heavy sweating! A deodorant that contains alcohol is most effective. Tight tops and synthetic clothes are a real no-no when it comes to sweating. Cotton or woollen clothes are better. If you have a heavy sweat problem, ask at the pharmacy – they have stronger deodorants that will help.