[Must Watch: Make Your Dark Underarms Lighter Using Baking Soda]
There are several reasons which lead to the darkening of the underarms and it often seems impossible to get them back to their lighter shade. Here are three ways to cleans, exfoliate and deodorize using baking soda- Take 1 tsp of baking soda and one tsp of lime juice and mix well to make a paste. Apply it on to the underarms and massage for 3 minutes and then wash off. You can do this every day.