how to have a white underarm?

what can i do to have a whiter underarm

Rub potato slice daily for few weeks, it acts as bleaching agent.

Rub lemon slice as its juice is acidic in nature it will help to get rid of any excess sweat, oil, and dirt on the surface of your skin. It will also help to get rid of the upper layer of dead skin and this will help to whiten dark underarms.