Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Hills, MI. Last updated April 2026.

What Is Athlete’s Foot?

Tinea pedis — athlete’s foot — is a fungal infection of the foot skin caused by dermatophytes, the same fungal organisms that cause ringworm and toenail fungus. It is extraordinarily common — affecting up to 70% of adults at some point in their lives — and thrives in the warm, moist environment of shoes and socks. Despite its ubiquity, athlete’s foot is frequently undertreated, leading to chronic infection and spread to toenails.

Types of Athlete’s Foot

The interdigital pattern is most common: macerated (soft, white), peeling, and fissured skin between the toes, particularly the 4th and 5th. This creates a portal for bacterial superinfection. The moccasin pattern causes diffuse dry, scaly, itchy skin across the sole and heel — often bilateral — and is the most difficult form to eliminate because the scale provides a protective barrier to antifungals. The vesicular pattern causes blisters on the arch and sides of the foot with intense itching and represents an inflammatory immune response to the fungus.

Why Over-the-Counter Treatments Fail

Most OTC antifungals (clotrimazole, miconazole, tolnaftate) are effective when used correctly for the full treatment duration — but most people stop when symptoms improve rather than completing the full 2-4 week course, leaving residual fungus to re-establish. The moccasin pattern additionally requires keratolytic treatment (urea, salicylic acid) to thin the scale that prevents antifungal penetration before applying antifungal agents. Inadequate drying between toes after bathing allows reinfection.

Professional Treatment Options

Prescription oral antifungals (terbinafine, itraconazole) are used for moccasin-type tinea pedis, extensive disease, or infections failing multiple topical courses. Prescription topical antifungals (ciclopirox, econazole, luliconazole) have higher potency and broader spectrum than OTC options. Treating concurrent toenail fungus is essential — untreated onychomycosis continuously re-seeds the foot skin.

Prevention

Maintain dry feet: dry thoroughly between toes after showering (using a hair dryer on a low setting is more effective than towel drying). Wear moisture-wicking socks (wool or synthetic, not cotton). Rotate shoes to allow drying between wears. Use antifungal foot powder in shoes. Wear sandals or flip-flops in pool areas, locker rooms, and hotel bathrooms. Contact Balance Foot & Ankle at (810) 206-1402 for persistent or recurrent athlete’s foot that hasn’t responded to home management.

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Stubborn Athletes Foot? Get Treatment That Actually Works

Over-the-counter antifungals dont always work, especially for chronic or severe athletes foot. Dr. Tom Biernacki identifies the exact fungal strain and prescribes targeted treatment to clear the infection and prevent recurrence.

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Clinical References

1. Havlickova B, et al. Epidemiological trends in skin mycoses worldwide. Mycoses. 2008;51(Suppl 4):2-15.
2. Crawford F, et al. Topical treatments for fungal infections of the skin and nails of the foot. Cochrane Database of Systematic Reviews. 2007;(3):CD001434.
3. Gupta AK, et al. Dermatophytosis: the management of fungal infections. Skinmed. 2005;4(5):305-310.

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Dr. Tom Biernacki, DPM

Dr. Tom Biernacki, DPM is a double board-certified podiatrist and foot & ankle surgeon at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has reached over one million views.