Exfoliation is the process of scrubbing away dead skin cells from the surface of the skin. If layers of dead skin are allowed to pile up, they can become a breeding ground for bacteria.
The underarm area deserves regular exfoliation as much as your face does. In fact, exfoliation is an ideal way to smooth and soften the underarm skin because the process exposes hair follicles, leading to a closer, smoother shave [source: Muniz]. It also unclogs pores and reduces the formation of acne.
To exfoliate the underarm, use a gentle exfoliating cleanser applied with a loofah, washcloth or your hand. If you want to exfoliate without taking a shower first, you can also try disposable exfoliating wipes. You can find them in any drug store.
Since exfoliation removes layers of skin, it's important to let the skin rejuvenate between treatments. To avoid skin irritation and damage, dermatologists recommend exfoliating the underarms no more than twice a week [source: Bergman].