Thick toenails are most often caused by fungus, repeated trauma, or psoriasis — and the right diagnosis is the difference between treatments that work in months and ones that do nothing for years.
You’ve come to the right podiatry team. Dr. Tom Biernacki, DPM, FACFAS — board-certified foot & ankle surgeon with 3,000+ surgeries — explains exactly what why your toenails are thick means and what works. Call (810) 206-1402 for same-day appointment at Howell or Bloomfield Township.
Medically reviewed by Dr. Tom Biernacki, DPM · Board-Certified Podiatric Surgeon · Last reviewed: April 2026 · Editorial Policy
The most important clinical decision with Why Are My Toenails Thick isn’t which treatment to start with — it’s identifying the correct subtype. That changes everything. Call (810) 206-1402.
Quick Answer
Thick Toenails 2026: Causes & Treatment Podiatrist relates to toenail conditions — typically caused by fungal infection or trauma. Most patients improve in 6-12 months for nail regrowth with conservative care. Same-week appointments in Howell + Bloomfield Township: (810) 206-1402.
Medically reviewed by Dr. Tom Biernacki, DPM — Board-certified foot & ankle surgeon, 3,000+ surgeries performed. Updated April 2026 with current clinical evidence. This article reflects real practice experience from Balance Foot & Ankle Specialists in Howell and Bloomfield Township, Michigan.
Quick Answer
Most foot and ankle problems respond to conservative care — proper footwear, supportive inserts, activity modification, and targeted stretching — within 4-8 weeks. Persistent pain beyond that window, or any symptom that prevents walking, warrants a podiatric evaluation to rule out fracture, tendon tear, or systemic cause.
Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Township, MI. Last updated April 2026.
Last Updated: March 2026 | Reading Time: 5 min
This article is for informational purposes only and does not replace professional medical advice. Schedule an appointment for personalized care.
Thick toenails are one of the most common foot complaints I see in clinic. But “thick toenails” isn’t a diagnosis — it’s a symptom with 7 different possible causes, each with a different treatment. Dr. Tom Biernacki DPM explains how to tell them apart.
7 Causes of Thick Toenails
1. Onychomycosis (Toenail Fungus) — Most Common Cause
Fungal infection is responsible for 50% of all thick toenail cases. Signs: yellow/brown discoloration, brittle or crumbling edges, white chalky buildup under the nail, foul odor. Spreads to adjacent nails if untreated. Requires antifungal treatment — does NOT resolve on its own.
2. Onychogryphosis (Ram’s Horn Nail)
A curved, thickened nail that grows in a claw-like shape. Most common in elderly patients who have neglected nail care. Caused by repeated trauma, poor circulation, or chronic pressure from ill-fitting shoes. Requires professional debridement and regular podiatric nail care.
3. Psoriasis
Nail psoriasis causes thickening, pitting (tiny holes), oil spots (yellowish-brown patches), and separation of the nail from the nail bed (onycholysis). Often affects multiple nails simultaneously and frequently accompanies skin psoriasis plaques elsewhere on the body.
Watch: Dr. Biernacki Explains Thick Toenails
Dr. Tom Biernacki, DPM | Balance Foot & Ankle — Howell & Bloomfield Township, MI | (810) 206-1402
4. Trauma (Subungual Hematoma / Repeated Microtrauma)
Shoes that are too short cause the nail to repeatedly hit the toe box during walking and running. Over time, this causes the nail to thicken as a defensive response. Black or brown discoloration may be present from accumulated blood under the nail.
5. Aging (Nail Dystrophy)
After age 60, nails naturally grow more slowly and can thicken as they lose moisture. The nail matrix (the growth center) becomes less efficient. This is a benign condition, but it does make nails harder to trim and more prone to ingrowth.
6. Poor Circulation / Peripheral Artery Disease
Reduced blood flow to the feet affects nail health. Thickened, slow-growing nails with surrounding dry skin, loss of foot hair, and cold feet may indicate peripheral arterial disease (PAD). This requires medical evaluation — not just nail treatment.
7. Yellow Nail Syndrome
A rare condition associated with lymphedema, respiratory conditions, or rheumatoid arthritis. All nails turn yellow and thicken simultaneously, often with slow growth and onycholysis.
How to Tell Fungus from Non-Fungus
The only definitive way is a nail culture or PCR test ordered by your podiatrist. However, fungus is most likely if: the nail is yellowed or brownish, crumbles at the edges, has white powder under it, smells unpleasant, or only one or two nails are affected (rather than all ten equally).
Treatment by Cause
- Fungal: Prescription topical antifungal (efinaconazole), oral antifungal, or laser treatment
- Onychogryphosis: Professional trimming and debridement every 6-8 weeks
- Psoriasis: Coordination with dermatology ± topical steroids to nail bed
- Trauma: Properly fitted shoes (thumb-width of space at the toe), possibly nail avulsion
- Aging/Poor circulation: Regular podiatric nail care, vascular evaluation if suspected PAD
Thick toenails that are painful, discolored, or affecting multiple nails deserve a professional evaluation — especially if you’re diabetic or have circulation issues. Don’t let them go untreated.
Balance Foot & Ankle — (810) 206-1402 | Howell & Bloomfield Township, MI
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Dr. Biernacki and our team at Balance Foot & Ankle are accepting new patients in Howell and Bloomfield Township, MI. Most insurances accepted.
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Top Walking Shoes for Foot Health
- New Balance 928v3 — Therapeutic/Diabetic Walking Shoe
- Brooks Addiction Walker — Motion Control
- New Balance 840v5 — Everyday Walking
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Our board-certified podiatrists treat this condition at two convenient locations. Same-day appointments often available.
In-Office Treatment for Thick Toenails
Thickened toenails are often caused by fungal infection, trauma, or psoriasis. At our Howell and Bloomfield Township offices, we use professional nail debridement and laser therapy to restore nail health.
Learn more about our toenail fungus laser treatment.
Dr. Tom’s Recommended Products
- Doctor Hoy’s Natural Pain Relief Gel — Natural pain relief for sore, thickened nail beds.
- PowerStep Pinnacle Insoles — Proper shoe fit reduces toenail trauma that causes thickening.
Shop all recommended products →
Disclosure: We may earn a commission from purchases at no extra cost to you.
Related Guides
Thick Toenails Getting Worse?
Professional debridement provides immediate relief and laser therapy treats the underlying infection. Howell (48843) and Bloomfield Township (48302).
Why Are My Toenails Thick? — Causes & Treatment
Thick, difficult-to-trim toenails? Our podiatrists diagnose the cause — whether fungal, traumatic, or age-related — and provide effective treatment options.
Learn About Our Toenail Treatment Options → | Book Your Appointment | Call (810) 206-1402
Clinical References
- Elewski BE. Onychomycosis: pathogenesis, diagnosis, and management. Clinical Microbiology Reviews, 1998;11(3):415-429.
- Rich P. Nail disorders. Medical Clinics of North America, 2009;93(6):1213-1225.
- Westerberg DP, Voyack MJ. Onychomycosis: current trends in diagnosis and treatment. American Family Physician, 2013;88(11):762-770.
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Howell Office
4330 E Grand River Ave
Howell, MI 48843
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Frequently Asked Questions
How long does it take a toenail to grow back?
6-12 months for a full big toenail. Smaller toenails 4-6 months. Speed varies with age, circulation, and nutrition.
Will this affect other nails?
Trauma affects only the injured nail. Fungal infection can spread without treatment. Systemic causes affect multiple nails simultaneously.
Should I cover the nail or leave it open?
Cover with a breathable bandage during work or activity. Leave open at night for healing. Keep dry and clean.
Ready to feel better?
Same-week appointments available in Howell and Bloomfield Township, Michigan.
Book Your VisitVisit Balance Foot & Ankle — Same-Day Appointments Available
Our podiatry team serves patients throughout Michigan including Howell, Brighton, and Bloomfield Township. If you’re dealing with heel pain, ingrown toenails, or a foot injury, we have same-day appointment availability.
Same-day appointments available. (810) 206-1402
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Dr. Tom Biernacki, DPM is a board-certified foot & ankle surgeon (ABFAS & ABPM) 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 made him one of the most-followed foot & ankle educators on YouTube.