Deodorant is a hygiene item that helps you counteract unwelcome body odor when you sweat. The most common is to apply the deodorant under the arms as a spray, with a pin or as a roll-on. If you have extra sensitive skin, choose a deodorant without perfume or alcohol. A deodorant that is antiperspirant reduces the amount of sweat where you use it. Products in this category are also called Antiperspirant.