Does a higher SPF provide more sun protection?

When it comes to the SPF level in sunscreen, a higher number doesn't always mean better protection. In this video dermatologist Dr. Ellen Marmur explains why.

How does sunscreen protect your skin? Learn the facts about SPF, UVA, and UVB rays, broad-spectrum sunscreens, and more.

Top dermatologists share their wisdom on ingredients and SPF levels—plus how much to use, how often to reapply, and more.

Learn what to expect and how this year is different from years past.

Necrotizing fasciitis is a dangerous infection that can start suddenly and move fast. Spot the signs and know how to respond.

These six possible causes of hair loss may surprise you.