That white, smelly stuff under your toenail is often a fungal infection (onychomycosis) or trapped debris, caused by fungi or bacteria thriving in warm, moist environments, leading to a buildup of crumbling nail and skin cells, often called "toe jam," which smells because of microbial activity. It can start as a white/yellow spot, causing thickening, discoloration, and crumbling, and usually needs proper hygiene, antifungal treatments (topical or oral), or sometimes professional care to resolve.
Feet are stinky, but if a bad odor is coming from your nails, it's probably fungus. If the stench is awful even after a good scrubbing, it's likely an infection run amok.
How to Get Rid of Toenail Odor
You and your podiatrist can decide on the best course for you: anti-fungal pills, medicated nail polish, and/or laser therapy. The reason I prefer laser procedures is that they're very safe and effective at improving the look of unsightly nails due to fungal infections.
Can You Scrape Out Toenail Fungus? No. You may be able to scrape a bit off the top of or from under your nails, but that won't cure the infection.
The fastest ways to get rid of toenail fungus involve professional medical treatments like prescription oral antifungal medications (Terbinafine) for effectiveness or laser therapy for a quick, non-invasive option, though it may need multiple sessions. For faster results with topical treatments, podiatrist-assisted nail debridement (thinning the nail) helps antifungal lacquers penetrate deeper. Home remedies are generally slower and less reliable than medical routes, according to sources like Healthline and the Mayo Clinic.
Although largely anecdotal, there are a few at-home remedies have helped some patients to manage their toenail fungus. These include soaking your feet in a solution of apple cider vinegar or Listerine antiseptic mouthwash. Generally, one part vinegar or Listerine to one part water is a good ratio for a foot soak.
If toenail fungus goes untreated, it worsens, causing the nail to thicken, discolor (yellow/brown), become brittle, crumble, and potentially separate from the nail bed, leading to pain, odor, and difficulty walking; it can spread to other nails/skin (athlete's foot) and, in rare cases, lead to serious bacterial infections like cellulitis, especially for those with diabetes or weakened immunity, potentially causing permanent nail damage or systemic issues.
White toenails can be a red flag because they may signal underlying issues like mineral deficiencies (iron, zinc), fungal infections, skin conditions (psoriasis), or more serious systemic problems such as liver disease, kidney disease, heart failure, or diabetes, though often they're just from minor trauma and grow out. Key signs to watch for include white patterns (like half-white nails from kidney issues), powdery texture (fungus), or other symptoms like fatigue, prompting a doctor visit.
What is most interesting is when the contaminated socks worn by patients with tinea pedis and onychomycosis were laundered in a domestic washing machine at 40ºC. Thirty-six percent of the socks revealed positive fungal cultures at the end of the cleaning and drying cycle.
There are several reasons why you might get a 'bad smell' from the underside of a toenail. Here, I will be focusing on one very common reason – fungal nails… Fungal nails can give off an offensive smell if you've ever been brave enough to scrape the muck from underneath the nail.
Dry Thoroughly: After soaking, dry the nails completely to prevent any residual moisture, which can promote further fungal growth. Apply Directly (Optional): Some people choose to apply undiluted apple cider vinegar directly to the affected nails using a cotton ball, leaving it on for a few minutes before rinsing.
It may be tempting to switch the soap and water for antibacterial hand gel, but nothing beats the old-fashioned soap and water. Soap will kill the germs, while the water will rinse it down the drain.
Oral and topical medications—Antifungal medications can be used internally and applied directly to the feet and toes to kill the microbes that are causing the infection. You can also spray the insides of your shoes with antimicrobials to prevent cross-contamination and renewed infections.
When to see a doctor for toenail fungus. If your symptoms do not get better with home treatment, make an appointment with your primary care physician or a podiatrist. They may recommend a prescription-strength topical medication, or an oral anti-fungal pill that you take for two or three months.
Nail fungus can cause the nail to become thick, ragged and discolored. An infected nail may separate from the nail bed. Nail fungus is a common infection of the nail. It begins as a white or yellow-brown spot under the tip of your fingernail or toenail.
Toenail fungus is tough to kill permanently, but the most effective treatments are prescription oral antifungal drugs (like terbinafine), followed by strong topical antifungals, often used together, while laser therapy and sometimes nail removal (surgery) are options for persistent cases, though home remedies rarely provide a complete cure and professional help is key for lasting success.
If after removing your toenail polish, you see these white chalky patches then in most cases it is a condition called keratin granulation. These occur from constant polish wearing.
Liver failure nails often appear as Terry's Nails, characterized by an opaque white or "ground glass" look across most of the nail, with only a thin, brownish or pinkish band at the very tip and the half-moon (lunula) often disappearing, though other changes like ridges or yellowness (jaundice) can also occur, indicating systemic issues.
Can You Scrape Out Toenail Fungus? No. You may be able to scrape a bit off the top of or from under your nails, but that won't cure the infection.
A podiatrist can treat the infection effectively and thoroughly with prescription anti-fungal medications and creams. They may alternatively use a special laser that passes light energy through the nail and under the nail bed to target and eradicate the fungi.
An ill-advised barefoot romp around the pool deck or even a pedicure gone wrong may be all the fungi need to gain access to the space underneath a toenail. Once there, the fungi set about their task of “mining” your nail for nutrients—and leaving it discolored, thickened, misshapen, and more.
“Each evening, patients go to a bathroom or other place with a vinegar-resistant floor, don old cotton socks, pour a few spoons of plain or apple-cider vinegar and a few spoons of water over the toes, and sit and read for 10-15 minutes. They then doff the socks, apply topical antifungals, and go to bed.
If you want to try this remedy, apply a bit of Vicks Vaporub to your affected toenails daily. It can still take several weeks to a couple of months for results to appear.
Tea tree oil is a popular and powerful antifungal and antiseptic agent. Diluted tea tree oil applied directly to the affected foot can help eliminate the fungus and prevent it from spreading. For best results, mix several drops with a carrier oil, then apply it twice daily.