Ringworm is a local infection of the skin with a fungus, usually Microsporum canis, Microsporium audouinii, or Trichophyton tonsurans . Doctors refer to these infections as "tinea" with several forms such as tinea corporis (ringworm on the body) and tinea capitis (ringworm of the scalp). Although the 2 are caused by the same organisms, they are treated differently. Ringworm can be caught from friends (exchanging combs, brushes, or hats) or from household pets. If you think your child may have ringworm, you should see your doctor.