Medically reviewed by Dr. Tom Biernacki, DPM
Board-certified podiatric surgeon | Balance Foot & Ankle, Howell & Bloomfield Hills, MI
Last reviewed: May 2026
Yellow, thick, lifting toenails are treatable — here is the prescription protocol that actually clears the fungus.
You are in the right place. Dr. Tom Biernacki, DPM, FACFAS — board-certified foot & ankle surgeon with 3,000+ surgeries — explains exactly what onychomycosis (toenail fungus) means and what works. Call (810) 206-1402 for same-day appointment at Howell or Bloomfield Hills.
Quick answer: Onychomycosis is a common foot/ankle topic that affects many patients. The 2026 evidence-based approach combines proper diagnosis, conservative-first treatment, and escalation only when needed. We treat this regularly at our Howell and Bloomfield Hills practices. Call (810) 206-1402.
Board-Certified Podiatric Foot & Ankle Surgeon · Last reviewed: May 5, 2026
Medically reviewed by Dr. Tom Biernacki, DPM
Board-certified podiatric surgeon | Balance Foot & Ankle | Last reviewed: April 2026
If your toenails are thick, yellow, or crumbling despite your best efforts, you are likely dealing with onychomycosis — the medical term for toenail fungus. It affects an estimated 10% of the general population and up to 50% of people over age 70. In our Balance Foot & Ankle clinics, it is one of the most common conditions we treat — and one of the most underestimated.
The most important clinical decision with Onychomycosis isn’t which treatment to start with — it’s identifying the correct subtype. That changes everything. Call (810) 206-1402.
The most important clinical decision with Onychomycosis isn’t which treatment to start with — it’s identifying the correct subtype. That changes everything. Call (810) 206-1402.
What Is Onychomycosis?
Onychomycosis (pronounced on-ih-ko-my-KO-sis) is a fungal infection that invades the nail plate and nail bed. The term comes from Greek: onyx (nail) + mykes (fungus). The most common causative organisms are dermatophytes — particularly Trichophyton rubrum — though yeasts (Candida) and non-dermatophyte molds are also responsible in some cases.
Onychomycosis progresses slowly and rarely resolves on its own. The fungi consume keratin — the protein that makes up your nail — gradually destroying nail architecture. In our clinic, we see patients who have had the infection for years before seeking help, by which point significant nail damage has occurred.
Key takeaway: Onychomycosis is the same condition as “toenail fungus” — the clinical term matters because different fungi require different treatments.
Types of Onychomycosis
There are four recognized clinical patterns, and identifying which type you have guides treatment selection:
- Distal subungual onychomycosis (DSO) — the most common type. Infection enters under the free edge of the nail and progresses toward the cuticle. The nail tip turns white or yellow, then the infection tracks proximally.
- White superficial onychomycosis (WSO) — infection attacks the nail surface, causing white, powdery patches. Easier to treat than DSO because the organism is on the surface, not deep in the nail plate.
- Proximal subungual onychomycosis (PSO) — infection enters near the cuticle and moves distally. Less common; when seen in healthy patients, consider checking for immunosuppression.
- Total dystrophic onychomycosis (TDO) — the entire nail is involved. This is the end-stage of any of the above patterns and is the most difficult to treat successfully.
Symptoms of Onychomycosis
Onychomycosis is a progressive condition. Early symptoms are subtle; late-stage disease is unmistakable:
- Nail discoloration — white, yellow, brown, or black patches or streaks
- Nail thickening — the nail becomes abnormally thick and difficult to trim
- Brittleness — the nail crumbles or breaks at the edge
- Distorted nail shape — the nail may curve, warp, or lift from the nail bed
- Onycholysis — separation of the nail from the nail bed
- Debris under the nail — chalky or powdery material accumulates under the nail
- Odor — some patients notice an unpleasant smell from affected nails
- Pain — not always present, but severe cases with nail lifting can be painful, especially in shoes
What Causes Onychomycosis?
Fungal nail infections occur when fungi — which thrive in warm, moist, dark environments — gain access to the nail. Risk factors we assess in every patient:
- Age — prevalence rises sharply after age 60 due to slower nail growth, reduced circulation, and accumulated exposure
- Athlete’s foot (tinea pedis) — the same fungi cause both; untreated athlete’s foot spreads to the nails
- Nail trauma — a damaged nail is an easy entry point for fungi
- Shared environments — gyms, pools, locker rooms, and nail salons are transmission sites
- Diabetes — peripheral vascular disease and neuropathy impair immune defenses in the foot
- Poor circulation — reduced blood flow limits immune response to the nail
- Immunosuppression — HIV, organ transplant medications, chemotherapy
- Hyperhidrosis — excess sweating keeps the nail environment chronically moist
- Family history — genetic susceptibility to dermatophyte infections is well documented
Key takeaway: Treating athlete’s foot early is one of the best ways to prevent onychomycosis — the same fungus causes both, and nail infection almost always follows untreated skin infection.
How Is Onychomycosis Diagnosed?
A podiatrist diagnoses onychomycosis based on clinical appearance plus laboratory confirmation. We don’t treat based on appearance alone — several other conditions look like fungal nails:
Conditions that mimic onychomycosis: nail psoriasis, nail trauma, lichen planus of the nail, bacterial nail infection (Pseudomonas causes green nails), and yellow nail syndrome. Treating “fungus” that is actually psoriasis will fail. This is why confirmation matters.
Diagnostic tests we use: PAS stain (periodic acid-Schiff staining of nail clippings), KOH preparation (dissolves nail keratin, revealing fungal elements under microscope), and nail culture (identifies the specific organism, typically takes 4–6 weeks). Newer PCR testing is available and gives faster, highly accurate results.
⚠️ See a podiatrist promptly if:
- You have diabetes and suspect a nail infection — fungal nails can cause skin breakdown
- The nail is separating significantly from the nail bed
- You notice pain or warmth — these suggest secondary bacterial infection
- The infection is spreading to other nails or to the skin
- Over-the-counter treatments haven’t worked after 3 months
Onychomycosis Treatment Options
Treatment selection depends on the severity of infection, which nails are involved, and your medical history. There is no single best approach for every patient:
Topical Antifungals
Topical antifungals work best for mild to moderate cases with less than 50% nail involvement and no matrix (cuticle area) involvement. FDA-approved topical options include efinaconazole (Jublia), tavaborole (Kerydin), and ciclopirox lacquer (Penlac). These require daily application for 48–52 weeks. Cure rates are lower than oral antifungals but they carry no systemic side effects.
Oral Antifungals
Oral terbinafine (Lamisil) remains the gold standard for moderate to severe onychomycosis. A 12-week course cures toenail infections in approximately 38–70% of patients. Itraconazole (Sporanox) is an alternative used in pulse dosing. Both require baseline and follow-up liver function testing. Oral antifungals are contraindicated in liver disease and interact with some medications.
Laser Treatment
Laser therapy for onychomycosis uses targeted light energy to kill fungi within the nail without systemic side effects. We offer laser treatment at Balance Foot & Ankle for patients who cannot tolerate oral antifungals or prefer a non-medication approach. Multiple sessions are typically needed. Laser is best used as part of a comprehensive protocol that includes topical maintenance.
Nail Debridement
Mechanical debridement — thinning and trimming the affected nail — is not curative on its own but is an important adjunct. By reducing nail thickness, we allow topical antifungals to penetrate more effectively. We debride severely affected nails in-office using specialized equipment.
The Most Common Mistake We See
The biggest mistake patients make with onychomycosis is stopping treatment too early. Even when nails look better, fungi can persist in the nail matrix. We advise continuing antifungal treatment until the nail has completely regrown clear — which takes 12–18 months for toenails. Stopping at 12 weeks of pills doesn’t mean the infection is gone; it means the active treatment phase is over. Topical maintenance after oral treatment significantly reduces relapse.
When Shoes Aren’t Enough — Dr. Tom’s Top 9 Orthotics
About 30% of patients I see for foot pain need MORE than a great shoe — they need a structured insole. Below: my complete 2026 orthotic ranking with pros, cons, and the specific patient I’d give each one to.
★ DR. TOM’S COMPLETE 2026 ORTHOTIC RANKING
9 Best Prefab Orthotics by Use Case
PowerStep, CURREX, Spenco, Vionic, and Tread Labs — every orthotic I’ve fitted to thousands of patients across both Michigan offices. Each card includes pros, cons, and the specific patient I’d give it to. Real Amazon ratings, review counts, and prices below.
Best All-Purpose Orthotic for Most Patients
Semi-rigid arch shell + dual-layer cushion + deep heel cup. The orthotic I’ve fitted to more patients than any other for 15 years. APMA-accepted. Trim-to-fit design works in athletic shoes, casual shoes, and most work boots.
✓ Pros
- Semi-rigid arch shell provides true biomechanical correction
- Deep heel cup centers the heel and reduces lateral instability
- Dual-layer cushion (top + bottom) lasts 9-12 months daily wear
- Available in 8 sizes for precise fit
- APMA-accepted and clinically validated
- APMA-accepted with superior cushioning versus rigid alternatives
✗ Cons
- Too thick for most dress shoes (use ProTech Slim instead)
- Some break-in period required (3-7 days for arch tolerance)
- Not enough correction for severe pes planus or rigid pes cavus
Dr. Tom’s Recommendation: If a patient has run-of-the-mill plantar fasciitis, mild flat feet, or arch fatigue, this is the first orthotic I try. Better value than most premium alternatives for 90% of patients, which is why it’s the first orthotic I reach for in the clinic. Sub-$50 typically.
Maximum Motion Control · Flat Feet & Severe Over-Pronation
PowerStep’s most aggressive stability orthotic. Adds a 2°-7° medial heel post on top of the standard PowerStep platform — designed specifically for flat-footed patients and severe pronators who need real corrective force.
✓ Pros
- 2°-7° medial heel post adds aggressive pronation control
- Same trusted PowerStep arch shell, more correction
- Built specifically for flat-foot biomechanics
- Excellent for posterior tibial tendon dysfunction (PTTD)
- Removable top cover for cleaning
✗ Cons
- Too aggressive for neutral-arch patients
- Needs longer break-in (10-14 days) due to stronger correction
- Adds 2-3 mm of stack height — won’t fit slim dress shoes
Dr. Tom’s Recommendation: When a patient comes in with significant flat feet AND symptoms (heel pain, arch pain, knee pain), the Original PowerStep isn’t aggressive enough. The Maxx is what gets prescribed. About 25% of my flat-footed patients end up here.
Low-Profile · Fits Dress Shoes & Narrow Casuals
3 mm slim profile with podiatrist-designed tri-planar arch technology. Engineered specifically to fit inside dress shoes, oxfords, loafers, and women’s flats without crowding the toe box. Vionic was founded by an Australian podiatrist.
✓ Pros
- 3 mm slim profile (vs 7-10 mm for standard orthotics)
- Tri-planar arch technology adds support without bulk
- Built-in deep heel cup despite slim design
- Fits dress shoes WITHOUT having to remove the factory insole
- Trim-to-fit · APMA-accepted
✗ Cons
- Less arch support than full-volume orthotics
- Top cover wears faster than thicker alternatives
- Not enough correction for severe foot deformities
Dr. Tom’s Recommendation: My default when a patient says ‘I need orthotics but I have to wear dress shoes for work.’ Slim enough to fit in oxfords and pumps without the heel sliding out. The single highest-impact change you can make for office workers with foot pain.
Built-In Metatarsal Pad · Morton’s Neuroma · Ball-of-Foot Pain
Standard Pinnacle orthotic with a built-in metatarsal pad positioned proximal to the metatarsal heads — the exact location that offloads neuromas and metatarsalgia. No need for separate met pads or pad placement guesswork.
✓ Pros
- Built-in met pad eliminates DIY pad placement errors
- Specifically designed for Morton’s neuroma + metatarsalgia
- Same trusted PowerStep arch + heel cup platform
- Top cover protects sensitive forefoot skin
- Faster relief than orthotics + add-on met pads
✗ Cons
- Met pad position is fixed (can’t fine-tune individual placement)
- Some patients with very small or very large feet need custom
- Slightly thicker than the standard Pinnacle
Dr. Tom’s Recommendation: If a patient has Morton’s neuroma, sesamoiditis, or generalized ball-of-foot pain (metatarsalgia), this saves a clinic visit and a prescription. The built-in pad placement is anatomically correct for 80% of feet. Way better than DIY met pads.
Adaptive Dynamic Arch · Athletic & Daily Wear
Currex’s flagship adaptive arch technology — the orthotic flexes with your gait instead of fighting it. Different stiffness zones along the length give you targeted support at the heel, midfoot, and forefoot. Available in three arch heights (low/medium/high).
✓ Pros
- Dynamic flex zones adapt to natural gait cycle
- Three arch heights ensure precise fit
- Lighter than rigid orthotics (no ‘heavy foot’ feel)
- Excellent for runners and athletic walkers
- European podiatric design (German engineering)
✗ Cons
- More expensive than PowerStep Original ($55-65 typically)
- Less aggressive correction than Pinnacle Maxx for severe cases
- Three arch heights means you must self-select correctly
Dr. Tom’s Recommendation: I started recommending Currex three years ago for runners who said PowerStep felt ‘too rigid.’ The dynamic flex zones respect natural gait. Best for active patients who walk 8K+ steps daily and don’t need maximum motion control.
Running-Specific · Heel Strike + Forefoot Strike Compatible
Currex’s purpose-built running orthotic. The midfoot flex zone is positioned for runner’s gait mechanics, with a flared heel cushion for heel strikers and a forefoot rocker for midfoot/forefoot strikers. Tested on 1000+ runners during product development.
✓ Pros
- Designed by German biomechanics lab specifically for runners
- Dynamic arch flexes with running gait (not static like PowerStep)
- Three arch heights (low/medium/high)
- Reduces overuse injury risk in mid-distance runners
- Lightweight (no impact on cadence)
✗ Cons
- Premium price ($60-75)
- Not aggressive enough for severe over-pronators (use Pinnacle Maxx)
- Runner-specific design = less ideal for daily walking shoes
Dr. Tom’s Recommendation: If a patient runs 20+ miles per week and has plantar fasciitis or shin splints, this is the orthotic I prescribe. The dynamic flex zones respect running biomechanics in a way that no rigid PowerStep can match. Pricier but worth it for serious runners.
Cavus Foot & High-Arch Patients
Polyurethane base with a deeper heel cup and higher arch profile than PowerStep — built for cavus (high-arched) feet that need maximum cushion and support. The 5-zone cushioning system addresses the unique pressure points of high-arch feet.
✓ Pros
- Deeper heel cup centers the heel for cavus foot stability
- Higher arch profile fills the void under high arches
- 5-zone cushioning addresses cavus foot pressure points
- Polyurethane base lasts 12+ months
- Available in Wide width
✗ Cons
- Too tall/aggressive for normal or low arches
- Won’t fit slim dress shoes
- Pricier than PowerStep Original
- Some patients find the arch height uncomfortable initially
Dr. Tom’s Recommendation: Cavus foot patients are often misdiagnosed and given low-arch orthotics — that makes everything worse. Spenco’s Total Support has the arch profile that high-arch feet actually need. About 15% of my patients have cavus feet; this is what they wear.
Cushion Layer · Standing All Day · Gel Pressure Relief
NOT a true biomechanical orthotic — this is a cushion insole. But for patients who want gel pressure relief instead of arch correction (or to add ON TOP of factory insoles in work boots), this is the best gel option on Amazon.
✓ Pros
- Genuine gel cushioning (not foam pretending to be gel)
- Targeted gel waves under heel and ball of foot
- Trim-to-fit · works in most shoe types
- Sub-$15 price (most affordable option in this list)
- Massaging texture is genuinely soothing
✗ Cons
- ZERO arch support — this is cushion only
- Won’t fix plantar fasciitis or flat-foot issues
- Compresses faster than PowerStep (4-6 months)
- Top cover wears through in high-mileage applications
Dr. Tom’s Recommendation: I recommend these to patients who tell me ‘I just want my feet to stop hurting at the end of my shift’ and who don’t have a biomechanical issue. Construction workers, factory workers, retail. Pure cushion does the job for them.
Tight-Fitting Shoes · Cycling Shoes · Hockey Skates
Tread Labs Pace insole with firm orthotic arch support for flat feet and plantar fasciitis relief. The replaceable top cover design makes it one of the most durable picks in this guide — backed by a million-mile guarantee and recommended for tight-fitting athletic footwear.
✓ Pros
- Firm orthotic arch support shell (podiatrist-grade)
- Slim profile fits tight athletic footwear
- Lasts 12+ months daily wear
- Excellent for cycling shoes specifically
- Built-in odor-control treatment
✗ Cons
- Premium price ($45-55)
- Less cushion than PowerStep equivalents
- Not as aggressive correction as Pinnacle Maxx for flat feet
- The signature ‘heel cup feel’ takes 1-2 weeks to adapt to
Dr. Tom’s Recommendation: If you’re a cyclist with foot numbness, hot spots, or knee pain — this is the orthotic. The stabilizer cap solves cycling-specific biomechanical issues that no other orthotic addresses. Worth the premium for athletes.
None of these solving your foot pain?
Some patients (about 30%) need custom-molded prescription orthotics. We make 3D-scanned custom orthotics in our Howell and Bloomfield Hills offices — specifically built for your foot mechanics.
Schedule a Custom Orthotic Fitting →FSA/HSA eligible · Most insurance accepted · (810) 206-1402
Frequently Asked Questions About the difference between onychom
What is the difference between onychomycosis and toenail fungus?
They are the same condition. Onychomycosis is the clinical term; toenail fungus is the colloquial name. Onychomycosis is technically more precise because it encompasses infections of any nail — fingernails or toenails — by fungi including dermatophytes, yeasts, and molds.
How long does onychomycosis treatment take?
Oral antifungal treatment courses run 12 weeks for toenails. However, because nails grow slowly, it takes an additional 12–18 months to see fully clear nails. Topical treatments require 48–52 weeks of daily application. Don’t judge treatment success by nail appearance at the end of the medication course.
Can onychomycosis spread to other people?
Yes. The dermatophytes that cause onychomycosis are transmissible through shared nail tools, footwear, socks, and contaminated floors. Avoid sharing nail clippers, wear sandals in public showers and locker rooms, and treat athlete’s foot promptly to prevent spread to others and to your own other nails.
Is there a permanent cure for onychomycosis?
Onychomycosis can be successfully treated — mycological cure rates reach 70–90% with oral antifungals plus topical maintenance. However, reinfection is common (up to 25% recurrence at 3 years) because the environmental exposure that caused the infection initially usually persists. Maintenance therapy and footwear hygiene are key to preventing recurrence.
Why do toenails take so long to clear after treatment?
Antifungal medications kill the living fungi but cannot remove the damaged nail tissue that’s already been infected. You are waiting for healthy nail to grow out and replace the damaged portion. Toenails grow approximately 1.5 mm per month — a full toenail takes 12–18 months to replace completely.
Sources
- Gupta AK, Stec N. Recent advances in therapies for onychomycosis. Expert Opin Pharmacother. 2019;20(16):1993–2000.
- Lipner SR, Scher RK. Onychomycosis: treatment and prevention of recurrence. J Am Acad Dermatol. 2019;80(4):853–67.
- Piraccini BM, Alessandrini A. Onychomycosis: a review. J Fungi. 2015;1(1):30–43.
- CDC. Fungal nail infections. Centers for Disease Control and Prevention. 2023.
Dr. Tom’s Podiatrist-Recommended Products
The OTC orthotic recommended most at Balance Foot & Ankle. Semi-rigid arch support with heel cradle. $40-50 vs. $400+ for custom orthotics.
View on Amazon →
Natural arnica + menthol + magnesium topical. Used in our clinic — apply 3-4x daily.
View on Amazon →
FTC Disclosure: As an Amazon Associate and Foundation Wellness affiliate, we earn from qualifying purchases. Dr. Biernacki only recommends products used in our clinic or personally vetted.
Ready to Get Relief?
Same-day appointments available in Howell & Bloomfield Hills, MI
4.9★ | 1,123 Reviews | 3,000+ Surgeries
Or call: (810) 206-1402
In-Office Treatment at Balance Foot & Ankle
If home treatment isn’t providing relief for your toenail fungus, our podiatry team at Balance Foot & Ankle can help with same-day evaluations and advanced in-office care.
AAD: Nail Fungus (Onychomycosis)
Ready to Get Relief?
Same-day appointments available in Howell & Bloomfield Hills, MI
4.9★ | 1,123 Reviews | 3,000+ Surgeries
Or call: (810) 206-1402
When toenail fungus has not responded to topicals
Most over-the-counter topicals fail because the antifungal cannot penetrate the nail plate. A podiatrist can confirm onychomycosis with a clipping culture or PAS stain, then offer prescription topicals (efinaconazole, tavaborole), oral terbinafine where appropriate, in-office laser therapy, or mechanical nail thinning to improve penetration. Treating early prevents spread to the other nails and the skin.
Balance Foot & Ankle — Howell & Bloomfield Hills, MI: board-certified podiatrists, same-week appointments, most insurance accepted.
Book a Toenail Fungus Evaluation → or call (810) 206-1402
Related reading: best toenail fungus treatment · foot fungus treatment · best socks for toenail fungus
📋 Dr. Tom Biernacki, DPM, FACFAS answers:
Oral terbinafine (Lamisil) taken for 12 weeks remains the gold standard for onychomycosis with the highest cure rates (70–80% mycological cure). It requires liver function monitoring but is well-tolerated in most patients. Oral itraconazole pulse therapy is an alternative. Prescription topical antifungals (efinaconazole/Jublia, ciclopirox lacquer) are significantly less effective (15–18% cure rates) but appropriate for patients who cannot take oral medication or have mild superficial infection. Laser treatments show inconsistent results in clinical trials. The critical point patients miss: “cure” takes 12–18 months because you’re waiting for the new nail to grow in — the medication clears the fungus quickly, but the damaged nail must grow out. Stopping treatment because the nail “looks the same” at 8 weeks is the number one cause of treatment failure.
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.