Skin discoloration is one of the most common skincare concerns. In addition to dark spots and other forms of hyperpigmentation that can develop on your face, discoloration can appear in places on your body below the neck, as well. One area where you may experience discoloration is your armpits. To understand how to treat underarm discoloration, you need to first determine what’s causing it. We tapped Dr. Joshua Zeichner, board-certified dermatologist, and Dr. Jeannette Graf, board-certified dermatologist and assistant clinical professor of dermatology at Mt. Sinai School of Medicine, to fill us in on potential reasons for underarm discoloration. With their help, we’re breaking down the common causes of dark-looking underarms and sharing how to address the concern, below. 
