| Subject | Contents |
| Definition | An infection of the body surface with mold-like fungi called dermatophytes. |
| Alternative Names | Dermatophytid; Tinea |
| Causes, incidence, and risk factors | Ringworm is a common skin disorder, especially among children, but may occur in people of all ages. It is caused by mold-like fungi (dermatophytes). See tinea corporis , also see 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 | itching of the affected area skin lesion , rash usually on exposed body areas ring shaped reddened patch ( skin, abnormally dark or light ) borders advance and spread, and the center clears borders appear scaly and distinct |
| 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 special 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. The fungi have a characteristic "spaghetti and meatballs" appearance. The skin scrapings can also be sent to the microbiology laboratory, and the fungus will grow in the culture medium. |
| Treatment | Ringworm usually responds to self-care. Keep the skin clean and dry. Over-the-counter antifungal or drying powders, lotions, or creams are applied to the affected skin. Those that contain miconazole, clotrimazole, or similar ingredients are often effective in controlling ringworm. Severe or persistent infection may require further treatment by the health care provider. Oral antifungal medications may be given, and are necessary if the hair is involved. Stronger, prescription topical antifungal medications, such as ketoconazole or sulconazole may be needed. In some cases, topical corticosteroids may be added to the topical antifungals. Antibiotics may be needed to treat secondary bacterial infections. |
| Support Groups | |
| Expectations (prognosis) | Ringworm usually responds to topical treatment within 4 weeks. Severe or resistant cases usually respond promptly to oral antifungal therapy. |
| Complications | secondary bacterial skin infections, cellulitis spread of tinea to feet, scalp, groin, nails, or other area pyoderma, dermatophytid, or other skin disorders overtreatment dermatitissystemic side effects of medications (See the specific medication) very contagious, all household members at risk |
| 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 is slightly contagious, so clothing, hairbrushes, or other items should be thoroughly cleaned and dried after use. |
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