Ringworm is a skin infection caused by a fungus—not a worm—and causes flat, ring-shaped patches to develop that have a raised scaly border.
Ringworm can be very itchy and can grow slowly, increasing in size and covering more areas of the body.
Ringworm risks can include:
- Spending time in hot, humid weather
- Having contact with an infected pet
- Sharing personal belongings (towels, clothes, razors and other things without disinfecting or washing them)
- Wearing clothing that chafes the skin
- Using a locker room or pool without washing and drying your feet before putting on your socks and shoes
Ringworm is very contagious—if you notice any signs or symptoms you should see a dermatologist immediately, keep the infected area clean and dry and avoid sharing personal belongings. Wash your hands immediately after touching the infected area.