(HealthDay News) -- Ringworm is a fungal skin infection. It can appear almost anywhere on the body, including the hands, feet, groin and scalp. While the condition is most prevalent in children, the fungus can affect people of any age.

The National Library of Medicine says ringworm usually appears as raised, red, scaly patches. They may blister or secrete fluid, may be itchy, and are usually surrounded by a brighter red edge that looks like a ring. If the fungus spreads to the hair, it may yield bald patches. Fungus on the nails may cause them to become thick and discolored, and to disintegrate.

Ringworm spreads in areas that are damp and warm. Highly contagious, it can be passed from person to person via direct skin contact or by sharing items like combs, towels, clothing, public showers, or pool surfaces. Pets, especially cats, may pass the fungus to people.