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

Athlete’s Foot (Tinea Pedis): Causes, Treatment & How to Stop Recurrence

Athlete’s foot — the colloquial term for tinea pedis, a fungal infection of the skin of the foot — is the most common skin condition we see in podiatry. It affects an estimated 15–25% of people at any given time, is highly contagious, and has a frustrating tendency to recur unless the underlying conditions that enabled the infection are addressed. The good news: with the right antifungal treatment and prevention strategies, athlete’s foot is entirely manageable.

What Causes Athlete’s Foot?

Tinea pedis is caused by dermatophyte fungi — primarily Trichophyton rubrum (the most common cause), T. mentagrophytes, and Epidermophyton floccosum. These fungi are present in the environment on surfaces like locker room floors, pool decks, communal showers, and changing rooms. They require moisture, warmth, and keratin (the protein in skin) to thrive.

Risk factors: warm, sweaty feet (hyperhidrosis); wearing occlusive footwear; communal bathing facilities; immunosuppression; diabetes; walking barefoot in public areas.

Types of Athlete’s Foot

Interdigital (Between the Toes) — Most Common

The classic presentation: scaling, maceration (white, soggy skin), itching, and fissuring (cracking) in the web spaces between the toes. The fourth interspace (between the fourth and fifth toes) is most commonly affected because it’s the deepest, most enclosed space where moisture accumulates. Without treatment, fissures can become portals of entry for bacterial superinfection.

Moccasin Type

Diffuse scaling and mild redness affecting the entire plantar surface (sole) and sides of the foot in a “moccasin” distribution. Often bilateral. Itching may be minimal, leading many patients to attribute it to dry skin. Frequently associated with concurrent toenail fungal infection (onychomycosis). Often requires oral rather than topical treatment due to the thickness of affected skin.

Vesicular (Blistering) Type

Clusters of itchy, fluid-filled vesicles (blisters) on the arch or instep. More acute presentation, often triggered by heat or stress. Blisters may rupture, leaving raw, painful areas. Secondary bacterial infection can occur if blisters are broken.

Ulcerative Type

Severe infection with open ulcerations, particularly in the web spaces. More common in immunocompromised patients. Requires aggressive treatment and monitoring for secondary bacterial cellulitis.

Treatment

Topical Antifungals (First-Line for Most Cases)

For interdigital and limited moccasin-type infections, topical antifungal creams, gels, or sprays are the first-line treatment. Evidence-based options:

• Terbinafine (Lamisil): Fungicidal (kills the fungus rather than just stopping growth). 1–2 weeks of treatment. Highest cure rates of any topical agent.
• Clotrimazole (Lotrimin): Fungistatic; 4 weeks of twice-daily application. Widely available OTC.
• Miconazole: Fungistatic; similar to clotrimazole.
• Econazole, ciclopirox, naftifine: Prescription options for recalcitrant cases.

Apply antifungal to the affected area AND 2cm beyond the visible infection. Apply after thoroughly drying the feet (including between the toes) and continue for the recommended duration even after symptoms resolve.

Oral Antifungals (Extensive or Recalcitrant Cases)

Moccasin-type tinea pedis with thick plantar skin, concurrent nail involvement, or infections not responding to topical treatment require oral antifungals:

• Terbinafine 250mg daily × 2 weeks: Most effective oral agent for tinea pedis; fungicidal mechanism provides high cure rates and low recurrence rates
• Itraconazole (pulse therapy): Alternative for patients unable to take terbinafine

Treating Toenail Fungus Concurrently

Up to 60% of tinea pedis cases coexist with toenail onychomycosis. If nails are infected, treating only the skin will result in rapid recurrence as the nails re-inoculate the skin. Concurrent nail treatment is essential for lasting cure in these patients.

Prevention: The Most Important Section for Recurrence

Most athlete’s foot recurrences aren’t treatment failures — they’re re-infections because the underlying risk factors weren’t addressed:

• Keep feet dry: Change socks daily; use moisture-wicking synthetic or wool socks rather than cotton (which stays wet); consider foot powder (miconazole or tolnaftate powder) in shoes
• Footwear hygiene: Rotate shoes to allow them to dry completely between uses. Spray the inside of shoes with antifungal spray. Replace old, contaminated shoes after treatment.
• Never go barefoot in communal areas: Wear sandals or water shoes in locker rooms, pool decks, and hotel room bathrooms
• Dry thoroughly between toes: After every shower — this is where the infection starts and persists
• Address hyperhidrosis: If your feet sweat excessively, treating the sweating (aluminum chloride solution, prescription antiperspirant, iontophoresis) dramatically reduces recurrence risk

Related Conditions

• Toenail Fungus Treatment
• Ingrown Toenail Treatment
• Podiatrist-Recommended Foot Care Products

Ready to Get Relief? Book an Appointment Today.

Board-certified podiatrists Dr. Tom Biernacki, Dr. Carl Jay, and Dr. Daria Gutkin see patients daily at our Howell and Bloomfield Township, MI offices.

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Eliminate Athlete's Foot for Good

Persistent athlete's foot and fungal skin infections need proper treatment to prevent spread to toenails. Our podiatrists provide effective antifungal therapies.

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Clinical References

1. Leyden JJ, et al. Tinea pedis: the etiology and global epidemiology of a common fungal infection. J Am Acad Dermatol. 2020;83(6):S32-S37.
2. Gupta AK, et al. Dermatophytosis: the management of fungal infections. Skin Therapy Lett. 2022;27(5):1-5.
3. Lipner SR, et al. Fungal infections of the foot. Dermatol Clin. 2021;39(4):543-554.