Rare, deadly, and often missed, some skin cancers develop in areas that rarely see the sun. Scientists are still learning about them, but here's what we know.

Master the art of summer skincare layering with expert advice, barrier-boosting ingredients, and science-backed alternatives ...

Melanoma symptoms provide key warning signs that can help you find this disease early, when it is most treatable. Learn ...

Medically reviewed by Marla Anderson, MD Diagnosing melanoma typically requires a physical exam and a biopsy. Imaging and ...