✅ Medically reviewed by Dr. Thomas Biernacki, DPM — Board-Certified Podiatrist · Last updated April 6, 2026

Quick Answer

Pitted keratolysis is a bacterial skin infection causing small crater-like pits on the soles of the feet, usually accompanied by a strong odor. It is caused by Kytococcus sedentarius or Corynebacterium bacteria thriving in moist, warm conditions. Treatment involves topical antibiotics (erythromycin 2% or clindamycin gel) applied twice daily for 2–4 weeks, combined with moisture-control strategies like antiperspirant foot sprays and breathable footwear.

How to Get Rid of Pitted Keratolysis Once & For All

Pitted keratolysis is one of those conditions that people often suffer with for months or years — partly because it looks like athlete’s foot or a wart, and partly because it’s treated with the wrong things. If you’ve noticed shallow pits or craters on the soles of your feet along with a distinctive unpleasant smell, here’s exactly what pitted keratolysis is and how to eliminate it for good.

What Is Pitted Keratolysis?

Pitted keratolysis is a bacterial skin infection caused by Corynebacterium species (sometimes also Kytococcus sedentarius or Dermatophilus congolensis). The bacteria produce enzymes that digest the top layer of skin, creating characteristic small craters or pits. Unlike athlete’s foot — which is fungal — pitted keratolysis is bacterial and requires a completely different treatment approach.

It’s one of the most underdiagnosed foot conditions — many patients (and even some healthcare providers) mistake it for a fungal infection or excessive callus buildup.

Recognizing Pitted Keratolysis: The Key Signs

• Small pits or craters in the skin of the sole — typically 1–7mm in diameter, often clustered
• White or yellowish discoloration of the affected areas
• Strong, characteristic odor — described as sour, cheesy, or sulfurous. This is the most distinguishing symptom.
• Worse when feet are wet — the pits become more visible after bathing or sweating
• Most common on weight-bearing areas — ball of foot, heel, toe tips
• Usually painless, but may cause mild tenderness or itching

What Causes It?

The bacteria that cause pitted keratolysis thrive in warm, moist, enclosed environments. Contributing factors include:

• Excessive foot sweating (hyperhidrosis) — the primary driver
• Wearing closed shoes or boots for extended periods
• Synthetic socks that trap moisture
• Working in hot, humid environments
• Prolonged standing or physical labor
• Poor ventilation of footwear

Athletes, military personnel, healthcare workers, and manual laborers are at highest risk.

How to Treat Pitted Keratolysis

Step 1: Address the Moisture Problem (Critical)

Without controlling sweat and moisture, antibiotic treatment will keep failing. This is the most important step:

• Switch to moisture-wicking or wool socks — never 100% cotton, which holds moisture
• Use antiperspirant on your soles — yes, the same type you use under your arms. Apply prescription-strength aluminum chloride (Drysol) or 20% aluminum chloride to the soles at bedtime for 2–4 weeks
• Alternate shoes daily — give each pair 24 hours to dry out completely
• Use breathable footwear — leather or mesh rather than synthetic materials
• Use foot powder (zinc oxide or talc-based) to absorb excess moisture throughout the day

Step 2: Topical Antibiotic Treatment

Prescription topical antibiotics are the mainstay treatment. Your podiatrist or doctor can prescribe:

• Erythromycin 2% gel or solution — apply twice daily to affected areas for 3–4 weeks
• Clindamycin 1% gel or lotion — equally effective, also applied twice daily
• Mupirocin (Bactroban) — another effective option
• Benzoyl peroxide (5–10%) wash — available OTC as a face wash but highly effective for pitted keratolysis when used as a foot soak or applied directly

Step 3: Daily Hygiene Protocol

• Wash feet with antibacterial soap or benzoyl peroxide wash daily
• Dry thoroughly between all toes — pat, don’t rub
• Change socks daily (or more frequently if sweating heavily)
• Disinfect footwear with antibacterial spray or UV shoe sanitizer

Why “Once & For All” Requires Maintenance

Pitted keratolysis responds well to treatment — most patients see significant improvement within 2–3 weeks of starting topical antibiotics plus moisture control. However, the bacterial environment is re-established quickly if you return to the same sweaty footwear habits that caused it.

Long-term prevention requires:

• Continued use of moisture-wicking socks
• Regular antiperspirant application during high-sweat periods
• Rotating and properly airing out footwear
• Annual check-in with your podiatrist if prone to recurrence

Podiatrist-Recommended Products for Pitted Keratolysis

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Related Articles

• How to Cure Athlete’s Foot Fungus Fast
• 15 Most Common Skin Conditions on the Feet
• Why Are the Bottoms of My Feet Yellow?
• Toenail Fungus: The Real Cause and Cure

Written by Dr. Tom Biernacki, DPM — Board-certified podiatrist at Balance Foot & Ankle Specialist, serving Howell and Bloomfield Hills, Michigan.

Related Treatment Guides

• Skin Lesion Treatment
• Plantar Fasciitis & Heel Pain Treatment
• Custom 3D Orthotics
• Sports Foot & Ankle Injury Treatment

Medical References & Sources

• American Podiatric Medical Association — Patient Education
• American Orthopaedic Foot & Ankle Society — Foot Conditions

Related Foot Care Resources

• Toenail Fungus Treatment Guide — fungal infections are commonly confused with pitted keratolysis
• Callus & Nail Care — professional foot care services
• Podiatrist Recommended Shoes — moisture-wicking footwear helps prevent recurrence
• New Patient Information — what to expect at your first visit, insurance accepted

In-Office Pitted Keratolysis Treatment at Balance Foot & Ankle

Most pitted keratolysis responds to topical antibiotics within 2-4 weeks. However, recurrent or severe cases may need prescription-strength treatments including erythromycin 2% gel, clindamycin 1% solution, or mupirocin 2% ointment. At our Howell and Bloomfield Hills offices, Dr. Tom confirms the diagnosis (ruling out plantar warts, fungal infection, and dyshidrotic eczema) and prescribes the appropriate antibiotic protocol based on severity.

Foot odor and pitting not clearing up? (810) 206-1402 | Book your evaluation →

⚠️ YouTube Gap: Pitted Keratolysis: Causes, Treatment & Prevention [8-12 min] — recommended future video for @MichiganFootDoctors.

Recommended Pitted Keratolysis Products

Doctor Hoy’s Natural Pain Relief Gel — Natural topical relief for any associated foot discomfort during treatment. Not ideal for: direct application to pitted areas with broken skin.

Aluminum Chloride 20% Antiperspirant — Apply to clean, dry feet at bedtime. Controls sweating that feeds the bacteria causing pitted keratolysis. The most effective preventive measure.

Moisture-wicking socks (wool or synthetic) — Change socks midday if feet sweat heavily. Avoid cotton which traps moisture.

Affiliate disclosure: We may earn a commission on purchases.

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Frequently Asked Questions About Pitted Keratolysis

Is pitted keratolysis a fungal infection?

No — this is the most common misdiagnosis. Pitted keratolysis is a BACTERIAL infection caused by Kytococcus sedentarius, Corynebacterium, or Dermatophilus congolensis. These bacteria thrive in warm, moist environments and literally digest the top layer of skin, creating the characteristic crater-like pits. Antifungal treatments are completely ineffective — you need topical antibiotics (erythromycin, clindamycin, or mupirocin).

How long does pitted keratolysis take to clear up?

With proper antibiotic treatment plus foot hygiene changes, most cases clear within 2-4 weeks. The treatment protocol: topical antibiotic applied twice daily, aluminum chloride antiperspirant at night, moisture-wicking socks, shoe rotation (never wear same shoes two days in a row), and daily foot washing with antibacterial soap. Without addressing the moisture component, recurrence is very common.

Why do my feet smell so bad with pitted keratolysis?

The bacteria produce sulfur compounds as they digest keratin (the protein in your skin). This is the same chemistry that makes rotten eggs smell. The odor is a direct byproduct of bacterial metabolism, not poor hygiene. Once the bacteria are eliminated with appropriate antibiotics, the odor resolves completely. Call (810) 206-1402 if over-the-counter treatments haven’t resolved the issue.

Clinical References

1. van der Snoek EM, et al. Pitted keratolysis; physicians’ treatment and their perceptions in Dutch army personnel. J Eur Acad Dermatol Venereol. 2005;19(5):565-569.
2. Blaise G, et al. Corynebacterium-associated skin infections. Int J Dermatol. 2008;47(9):884-890.
3. Lockwood LL, et al. Pitted keratolysis: an update. Cutis. 2021;107(1):40-42.

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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.