Sweat is your bodies way of cooling down. Our brains send messages to the sweat glands so it doesn’t overheat. Sweat is made from water and chemicals from the body. Sweat leaves the body through pores. Sweat doesn’t actually smell, but when its mixed with bacteria that lives on your skin it can make you smell. This is why we wear deodorant so we mask any smells that may be given off. If you are sweating alot due to exercise or excusion you need to replenish your body with water so you don’t become dehydrated.