Ringworm is contagious and spreads through direct contact with an infected person or pet.
People also can contract the fungus from soil or from surfaces and things that an infected person has touched, such as toys, a pillow, or the locker room floor.
Ringworm is characterized by a red ring of small blisters or a red ring of scaly skin that grows outward as the infection spreads. Ringworm is caused by a fungus that grows on the skin.
Once the fungus is established, it spreads out in rings.
The center of the ring may clear up, while a new ring of infection develops at the edge of the old ring.
The rash can appear almost anywhere on the body, with the scalp, feet and groin being common sites.