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Ringworm, tinea manuum on the finger
Ringworm, tinea manuum on the finger
Ringworm, tinea corporis on the leg
Ringworm, tinea corporis on the leg
Tinea (ringworm)
Tinea (ringworm)

Ringworm
Definition:
Ringworm is an infection of the skin caused by a fungus.

Alternative Names:
Dermatophytid; Tinea

Causes, incidence, and risk factors:

Ringworm is a common skin disorder, especially among children, but it may affect people of all ages. Though its name suggests otherwise, it is caused by a fungus, not a worm.

For more specific information, see also tinea corporis (ringworm infection of the skin), tinea capitis (ringworm involving the scalp), tinea cruris (ringworm of the groin, also called jock itch), and tinea pedis (ringworm on the feet, also called athlete's foot).
Symptoms:
Signs and tests:
The diagnosis is primarily based on the appearance of the skin. Certain species of fungus will appear florescent if the skin is examined with a blue light called a Wood's lamp in a dark room. A more definitive diagnosis can be made by scraping the affected area of skin and examining the cells under a microscope.
Treatment:

Ringworm usually responds to self-care without formal medical attention.

  • Keep the skin clean and dry.
  • Apply over-the-counter antifungal or drying powders, lotions, or creams. Those that contain miconazole, clotrimazole, or similar ingredients are often effective.

Many products aimed at treating these infections on particular areas of the body can be purchased at most pharmacies.

Severe or persistent infection may require treatment by a health care professional. Oral antifungal medications may be given and are necessary if the hair is involved. Prescription topical antifungal medications such as ketoconazole are stronger than over-the-counter products and may be needed.

Antibiotics may also be needed to treat secondary bacterial infections.
Expectations (prognosis):
Ringworm usually responds to topical treatment within 4 weeks. Severe or resistant cases usually respond promptly to oral antifungal therapy.
Complications:
Calling your health care provider:
Call for an appointment with your health care provider if ringworm does not improve with self-care, or if symptoms persist longer than 4 weeks.
Prevention:

Good general hygiene helps prevent ringworm. Keep the skin clean and dry.

The fungus can be contagious in some cases, so clothing and hairbrushes, combs, or other personal care items should be thoroughly cleaned and dried after use.
Review Date: 10/28/2002
Reviewed By: Philip L. Graham III, M.D., F.A.A.P., Department of Pediatrics, Children's Hospital of New York, Columbia University, New York, NY. Review provided by VeriMed Healthcare Network.
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