Deodorants do not block the sweat glands and let the body flush out the toxins. Sweating is actually important for the body to function properly and sweat is not smelly. The bad odour is when the sweat gets mixed with the bacteria under the arms. Deodorants work on the skin surface by eliminating the bacteria under the arms and the scent in the deodorant provides freshness and soothing fragrance all day long.