Those who spent much of the summer months under the sun may find new or changing moles that can sometimes cause concern. While most moles are harmless, some have the potential to become cancerous. As ...

Skin cancer is the most common cancer in the U.S. Learn the main types, warning signs, and the prevention tip dermatologists say not to skip.

Skin cancer on the scalp may take the form of growths such as ulcers, moles, and sores. These growths can change in color, size, and shape. Treatment options vary depending on the type of skin cancer.

Medically reviewed by Casey Gallagher, MD Birthmarks are present at birth or develop soon after and vary in shape, color, and size.  Moles often appear during late childhood or young adulthood and can ...