Overview
Warts are small, rough growths on the skin caused by a common virus that infects the top layer of skin. They spread by touch and are most often seen on the hands, fingers and feet. Warts are harmless and many disappear on their own over months to a couple of years, though they can be stubborn. Several treatments, from creams to freezing, help clear those that are painful, spreading or bothersome.
Symptoms
- Small, firm, rough bumps on the skin
- Grainy growths, often with tiny black dots inside
- Warts on the hands, fingers, feet or knees
- Pain on pressure when on the sole of the foot
- Spread to nearby skin or to others by touch
When to see a doctor
See a skin doctor if warts are painful, spreading, on the face or genitals, or do not clear with simple treatment.
Causes
The human papillomavirus (HPV), spread by skin contact and shared surfaces. Cuts and moist skin make infection easier.