How to Get Rid of Toenail Fungus: A Complete Guide
How to Get Rid of Toenail Fungus: A Complete Guide
By Sylke Bommel Ā· Updated August 2026 Ā· 7 min read
Key Takeaways
- Toenail fungus (onychomycosis) affects roughly 10% of adults, rising to up to 50% of people over 70
- Dermatophyte fungi, mainly Trichophyton rubrum, cause most cases and thrive in warm, damp shoes and socks
- Topical treatment works best on mild to moderate infections caught early, before the fungus reaches the nail bed
- Filing back the nail before applying a topical solution meaningfully improves how well the antifungal penetrates
- Diabetics and anyone with poor circulation should have a podiatrist confirm the diagnosis before self-treating
What Is Toenail Fungus?
Toenail fungus, medically called onychomycosis, is a fungal infection of the nail plate or nail bed that thickens, discolors, and gradually distorts the toenail.
It is one of the most common nail disorders seen in podiatry clinics, and it does not resolve on its own. Left untreated, it tends to spread to neighboring nails or the surrounding skin.
Most cases are caused by dermatophyte fungi, particularly Trichophyton rubrum, though yeasts and non-dermatophyte molds are also responsible in a meaningful share of infections, especially in older adults.
What Causes Toenail Fungus?
Toenail fungus develops when dermatophyte fungi, yeasts, or molds infect the nail through small cracks in the nail or surrounding skin.
The big toenail is affected more often than the others, largely because it takes the most repeated microtrauma from shoes. Warm, damp environments, such as sweaty socks, shared locker rooms, and pools, give fungi the conditions they need to multiply.
Risk climbs with age, diabetes, poor circulation, a weakened immune system, and a personal or family history of athlete's foot. People who keep their feet in closed, non-breathable shoes for long stretches of the day are also more susceptible.
How Is Toenail Fungus Diagnosed?
Toenail fungus is diagnosed by a clinician examining the nail and, when needed, confirming the fungus with a lab test on a nail clipping.
Visual inspection alone can be unreliable, since psoriasis, nail trauma, and other conditions can mimic fungal changes. A KOH microscopy exam or fungal culture confirms the diagnosis and can identify which type of organism is involved, which matters because dermatophytes, yeasts, and molds do not all respond the same way to treatment.
If you are diabetic or have circulation problems, get any suspected nail fungus checked by a podiatrist rather than guessing from appearance.
Signs and Symptoms
The clearest sign of toenail fungus is a nail that turns yellow, white, or brown and becomes noticeably thicker or more brittle than the surrounding nails.
| Sign | What it looks like |
|---|---|
| Discoloration | Yellow, white, or brownish patches under or on the nail |
| Thickening | Nail becomes noticeably harder to trim |
| Crumbling edges | Nail edge becomes ragged or flakes apart |
| Distorted shape | Nail lifts from the nail bed or warps |
| Odor | A faint, unpleasant smell from under the nail |
Treatment Options for Toenail Fungus
Mild to moderate toenail fungus responds best to a topical antifungal applied consistently over several months, while oral antifungals are typically reserved for more severe or resistant infections.
Because the nail plate is dense, topical treatment works best when the affected nail is first filed back so the solution can actually reach the fungus living deeper in the nail bed, rather than sitting on the hardened surface.
This is the exact mechanism behind Imperial Feet's Nail Mycosis Solution: it is formulated to penetrate the nail plate and reach the fungus at the nail bed, and it is often paired with light filing of the nail for better contact. Consistency matters more than strength here, since nails grow slowly and visible improvement in a fully clear nail can take several months.
Prevention and Long-Term Management
Preventing toenail fungus comes down to keeping feet dry, rotating footwear, and avoiding bare feet in shared damp spaces.
Change socks if your feet sweat during the day, alternate shoes so each pair has time to fully dry out, and wear sandals in locker rooms, pools, and communal showers. Trim nails straight across and avoid sharing nail clippers or files.
Because reinfection is common, especially from shoes that were worn during an active infection, treating or replacing old footwear alongside the nail is part of a durable recovery.
~10%
of the general adult population has toenail fungus, rising to up to 50% of people over age 70 (Thomas et al., J Clin Pharm Ther, 2010)
When to See a Podiatrist
- āYou have diabetes or a circulation disorder
- āThe nail is painful, swollen, or shows signs of infection
- āTopical treatment has not improved the nail after several months
- āMore than one nail is affected or the infection is spreading
- āYou are unsure whether the nail changes are actually fungal
ā ļø Important: Diabetics and those with poor circulation should see a professional before self-treating any suspected nail fungus.
Nail Mycosis Solution
Nail Mycosis Solution is formulated to penetrate the nail plate and reach fungus at the nail bed, working best on nails that have been lightly filed back first.
View Toe Fungus SolutionĀFrequently Asked Questions
How do you get rid of toenail fungus fast?
There is no truly fast cure, since nails grow slowly, but consistent daily use of a penetrating topical antifungal on a filed-back nail, combined with dry feet and clean footwear, gives the best realistic timeline, typically several months to see a fully clear nail.
Can toenail fungus go away on its own?
No. Onychomycosis does not usually resolve without treatment and can spread to other nails or skin if left alone, so early, consistent treatment is more effective than waiting.
Why does toenail fungus mostly affect the big toe?
The big toenail takes the most repeated pressure and microtrauma from shoes, which creates small openings for fungus to enter, and it is also slower growing, giving an infection more time to establish itself.
Is toenail fungus contagious?
Yes, it can spread through direct contact or shared damp surfaces like locker rooms, pools, and nail tools, which is why footwear hygiene and not sharing clippers matters during treatment.
Does filing the nail help antifungal treatment work better?
Yes. Gently filing back the thickened nail surface reduces the barrier the solution has to penetrate, allowing topical antifungals to reach the fungus at the nail bed more effectively than applying to an unfiled nail.
Clinical Sources
- Thomas J, Jacobson GA, Narkowicz CK, Peterson GM, Burnet H, Sharpe C. Toenail onychomycosis: an important global disease burden. J Clin Pharm Ther. 2010;35(5):497-519. doi:10.1111/j.1365-2710.2009.01107.x. PMID: 20831675.
- Onychomycosis. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025. NCBI Bookshelf ID: NBK441853.
- Gupta AK, et al. Global prevalence of onychomycosis in general and special populations: An updated perspective. PMID: 38606891.
- Zalacain A, Merlos A, Planell E, Cantadori EG, Vinuesa T, ViƱas M. Clinical laser treatment of toenail onychomycoses. Lasers Med Sci. 2017. doi:10.1007/s10103-017-2198-6. PMCID: PMC5911271.
Related Reading
- Everything you need to know about toenail fungus
- Different Types of Foot Fungus and the Best Treatment
- Why is nail fungus so hard to get rid of?
Owner, Imperial Feet ā Third-Generation Foot Care
Sylke Bommel is the owner and third-generation leader of Imperial Feet, the Dutch professional foot care brand her grandfather founded in 2001. Raised in Aruba and based in Haarlem, just outside Amsterdam, she has led the brand's international expansion for over a decade, growing Imperial Feet from a single Dutch distributor to a professional range used by pedicurists, podiatrists, and pharmacies in more than 20 countries, including the United States.
Editorial note: Sylke writes from the perspective of a foot care brand owner and formulator, not a medical practitioner. Content is educational and does not replace individual medical advice from a qualified foot care professional.
Disclaimer: This article is for informational purposes only and does not replace individual medical advice from a qualified foot care professional. If you have diabetes, poor circulation, or a persistent infection, consult a podiatrist before self-treating.
