Ringworm (Tinea Infection): Causes, Symptoms & Treatment
Understand this common fungal skin infection and how to treat it effectively.
What is Ringworm?
Ringworm, medically called tinea, is a contagious fungal infection of the skin caused by dermatophyte fungi. It gets its name from the circular, ring-like rash it typically forms, not from any actual worm. It can affect the body, scalp, feet (athlete's foot), groin (jock itch), or nails.
Causes of Ringworm
- Direct skin-to-skin contact with an infected person
- Contact with infected animals, especially cats and dogs
- Sharing contaminated towels, clothing, combs, or sports gear
- Warm, humid, and sweaty conditions that favor fungal growth
- Walking barefoot in damp communal areas like locker rooms or pools
Symptoms of Ringworm
- A red, circular, ring-shaped rash with a raised, scaly border
- Clearer or normal-looking skin in the center of the ring
- Itching and mild discomfort in the affected area
- Cracked, peeling skin between toes (in athlete's foot)
- Patchy hair loss and scaling (in scalp ringworm)
Types of Ringworm
- Tinea Corporis – on the body
- Tinea Capitis – on the scalp
- Tinea Pedis – athlete's foot
- Tinea Cruris – jock itch (groin area)
- Tinea Unguium – nail infection
Diagnosis
Diagnosis is usually made through visual examination. A doctor may also perform a KOH (potassium hydroxide) skin scraping test under a microscope to confirm the presence of fungus, especially in unclear or recurrent cases.
Treatment Options
- Topical antifungal creams (clotrimazole, terbinafine, or miconazole)
- Oral antifungal medication for widespread, scalp, or nail infections
- Antifungal shampoos for scalp ringworm
- Keeping the affected area clean and dry throughout treatment
Prevention Tips
- Avoid sharing towels, clothes, or grooming items
- Keep skin dry, especially in skin folds and between toes
- Wash hands after touching pets or animals
- Wear breathable, moisture-wicking fabrics during exercise
- Disinfect gym equipment and mats before and after use
When to See a Doctor
See a dermatologist if the rash spreads rapidly, doesn't respond to over-the-counter antifungal creams after 2 weeks, affects the scalp or nails, or if you have a weakened immune system.