What Warts Actually Are (And Why They Show Up on Skin) Warts look simple, but scientifically, they’re tiny viral overgrowths caused by specific strains of the human papillomavirus (HPV). These strains ...

Warts are stubborn, contagious, and often misunderstood. Luke Johnson, MD, a dermatologist with University of Utah Health, shares what actually helps—from over-the-counter salicylic acid to in-office ...