First take a balance diet, eat vegetables, take a bath regularly, wash your armpits with soap, stop smoking, drink a lot of water, don't get dehydrated. Make sure you wear clean clothes.
For women the scent of deodorant is flowery, but men's deodorants are more effective when it comes to smelly armpits. Men's dove smells good and works. Other ways to help reduce the sweat that wipes off the deodorant is by applying powder to the underarms when sweating.