A single mom recently posted a PSA on TikTok after a seemingly benign imperfection turned out to be cancer. Rachel, 33, had a ...

Medically reviewed by Casey Gallagher, MD Acne is a common skin condition that affects up to 50 million Americans each year.

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.