Nail fungus caused by fake nails is treatable, but it won’t go away on its own, and the first step is always removing the artificial nails. Acrylic, gel, and press-on nails create a sealed environment where moisture gets trapped between the fake nail and your natural nail. Fungi thrive in that warm, damp space, and no treatment can reach the infection while the artificial nail is still in place.
Why Fake Nails Cause Fungal Infections
Artificial nails are bonded to your natural nail plate with adhesive. If the seal loosens even slightly, water seeps underneath during handwashing, showers, or everyday activities. That trapped moisture creates the perfect breeding ground for dermatophytes, the group of fungi responsible for most nail infections. The specific culprit is usually a fungus called Trichophyton rubrum.
Poorly applied nails, nails left on too long, and nails applied over already damaged nail beds all increase the risk. The longer moisture sits under the acrylic, the faster the fungus spreads through the nail plate. You might first notice a yellowish or greenish discoloration near the base or edges of the nail, a foul smell, or the nail becoming thicker and more brittle.
Step One: Remove the Fake Nails
No antifungal treatment, topical or oral, works effectively while the artificial nail is still covering the infection. Have the fake nails professionally removed or soak them off at home with acetone. Don’t pry them off, since forcing removal can tear the nail plate and make the infection worse. Once the acrylic or gel is off, trim the affected nail as short as you comfortably can and gently file down any thickened areas. This helps antifungal products penetrate the nail.
You’ll need to keep fake nails off entirely until the infection is fully resolved and healthy nail has grown back, which takes months. Reapplying acrylics or gel over an active infection traps the fungus again and restarts the cycle.
Topical Treatments for Mild Cases
If the infection is limited to a small area of the nail surface (roughly the outer edges or tip, without involvement of the nail root), topical antifungal lacquers are a reasonable first option. These are prescription nail polishes that you paint directly onto the affected nail.
The two most commonly prescribed lacquers work on different schedules. One is applied once weekly, while the other starts at three times per week for the first month, drops to twice weekly the second month, then once weekly from the third month onward. Treatment lasts about six months for fingernails. In clinical trials, complete cure rates with topical lacquers ranged from about 24% to 34%, depending on the product. That means topical treatment alone clears the infection in roughly one out of three people. It works best when the fungus hasn’t reached the base of the nail where new growth happens.
Oral Antifungals for Moderate to Severe Cases
When the infection covers a large portion of the nail, has reached the nail matrix (the root), or hasn’t responded to topical treatment, oral antifungal medication is significantly more effective. Oral drugs reach the fungus through your bloodstream, attacking it from underneath the nail plate rather than trying to soak through from the top.
The first-line oral treatment has the highest clinical and mycologic cure rates of any antifungal option. For fingernail infections, the typical course is six weeks of daily medication. Relapse rates with this drug are considerably lower than alternatives: one five-year study found relapse rates of 23% compared to 53% with the next most common oral option.
The main concern with oral antifungals is liver health. Your doctor will likely run a blood test to check liver enzyme levels before starting treatment. People with chronic or active liver disease generally can’t use these medications. There are also interactions with certain antidepressants, beta blockers, and other common medications, so bring a full list of what you’re taking to your appointment.
What About Tea Tree Oil and Home Remedies?
Tea tree oil is the most studied natural remedy for nail fungus, and it does have some real antifungal activity. In a clinical trial of 66 patients who applied pure (100%) tea tree oil daily for six months, 27% achieved complete cure and 65% showed partial improvement. Broader data across multiple trials puts mycological cure rates (meaning the fungus is actually eliminated on lab testing) between 82% and 89%, though visible clinical cure rates varied widely, from 27% to 78.5%.
Those numbers are promising but come with caveats. You need to use it consistently, twice daily, for at least six months. About 6% to 10% of people in trials developed skin irritation or mild dermatitis from the oil. And if your infection is moderate to severe, tea tree oil alone is unlikely to fully clear it.
Vinegar soaks are widely recommended online, but there’s minimal clinical evidence supporting their use for established nail fungus. Vinegar may help create a slightly acidic environment that discourages fungal growth, but it hasn’t been shown to cure an active infection. If you want to try it as a supplement to medical treatment, it’s unlikely to cause harm, but don’t rely on it as your primary approach.
How Long Recovery Takes
Even after the fungus is eliminated, your nail won’t look normal right away. The damaged, discolored nail has to physically grow out and be replaced by new, healthy nail. For fingernails, full regrowth takes 12 to 18 months. You’ll see healthy, clear nail gradually appearing at the base and pushing the damaged portion forward as you trim it away.
During this time, the nail may still look rough, ridged, or slightly discolored even though the infection is gone. That’s normal. The key indicator of successful treatment is that the new growth coming in at the base looks clear and smooth. If new growth is also discolored or thickened, the infection may still be active and you should follow up with your doctor.
What Happens If You Don’t Treat It
Nail fungus doesn’t resolve on its own, and ignoring it allows the infection to spread deeper. Over time, the nail can become severely thickened, dry, and brittle. It may develop ridges or waves, turn yellow or green, and eventually detach from the nail bed and fall off entirely. In rare cases, untreated infections can lead to secondary bacterial infections in the surrounding skin, which can progress to involve deeper tissue or even bone. This is uncommon but more likely in people with diabetes or compromised immune systems.
Preventing Reinfection When You Return to Fake Nails
Once your nails are fully grown out and healthy, you can safely get acrylics or gel nails again, but choosing a clean salon matters. Tools should be washed with soap and water, then soaked in an EPA-registered disinfectant for 10 to 30 minutes between clients. UV sanitizing boxes, which many salons display prominently, only store already-clean tools. They don’t actually disinfect. If you see a salon pulling tools straight from a UV box without prior disinfection, that’s a red flag.
Watch for technicians who wash their hands between clients and wear gloves. A reputable salon will not apply nails over visibly infected, damaged, or irritated nail beds. If a technician doesn’t examine your nails before starting, consider that a warning sign.
Between salon visits, keep an eye on your nails for early signs of lifting or separation from the nail bed. Moisture that gets trapped under a loose acrylic is how most of these infections start. If a nail starts to lift, have it professionally repaired or removed promptly rather than waiting for your next appointment. Keeping your hands dry after washing and avoiding prolonged water exposure while wearing acrylics also reduces your risk significantly.