Ringworm is a fungal infection of the skin---not caused by any type of worm---that is transmitted by skin-to-skin contact with an infected person or through contact with a surface that an infected person has touched. Ringworm can affect any skin on the body, but the fungus thrives in warm, moist areas. When it appears on the groin, it's called jock itch; on the feet, it's called athlete's foot.
Step 1
Examine areas of your body that are excessively itchy, especially on the foot or groin.
Step 2
Look for red, scaly patches of skin. Ringworm infection sites are often deep red around the circumference of the infection and lighter toward the center. This gives the infection a ringlike look.
Step 3
Look for hair loss in itchy areas covered by hair, such as on the scalp or beard. Ringworm will cause temporary bald patches.
Step 4
Go to a doctor for a final diagnosis. Your doctor may diagnose the ringworm simply from the appearance of your skin. He may also scrape a small sample of skin to examine under a microscope.
Tips and Warnings
- Symptoms usually appear four to 10 days after exposure to the fungus. Ringworm typically is treated with over-the-counter topical creams, but you should contact your doctor if your symptoms worsen or if the infection spreads.
