Half of people over 70 have it, and the cream on the drugstore shelf physically cannot reach it. Here are the six treatments dermatologists actually use, and the two things sold as cures that are not approved to cure anything.
Toenail fungus can be treated, but almost nothing sold over the counter can treat it. The medicine has to get through the nail, and creams do not.
A mold called a dermatophyte feeds on keratin, the protein that makes nails hard. It settles under the nail plate, where products made for skin cannot follow.
Here are the six treatments dermatologists actually use. Then why the first step is proving it is fungus at all, and the timeline that makes people quit too soon.
Six Treatments Dermatologists Actually Reach For
There is no single best option. The American Academy of Dermatology says the plan is built around your health, your other medicines, how much nail is affected, and which fungus is there.
What follows is the working menu, roughly in the order it gets considered.
- Prescription solution painted on the nail. Efinaconazole and tavaborole are FDA approved for toenail fungus, applied once a day for about 48 weeks. AAD says this route is often chosen for mild cases and for people 60 and older.
- Prescription nail lacquer. Ciclopirox is applied daily and stripped off with rubbing alcohol every seven days. Any loose infected nail has to be removed first for it to work.
- Oral terbinafine. A daily pill for 12 weeks to treat toenails. AAD says you need a liver function test before starting and again six weeks in, and no alcohol while you are taking it.
- Oral itraconazole. Also daily for 12 weeks for toenails, taken with a full meal. AAD warns it interacts with many drugs including statins, and is not for use in pregnancy.
- Softening or thinning the nail. A 40 percent urea cream softens a thick nail so medication can reach further. Debridement, where the dermatologist removes layers of nail, does the same job mechanically.
- Removing the nail. Surgical or chemical removal is what is left when everything else has failed. AAD notes a toenail then takes 12 to 18 months to grow back.
Topical and oral are not rivals. Cleveland Clinic says topical medicines work best when paired with oral ones. It also says oral drugs may offer the most on their own.
That pairing is why procedures show up in a plan. Filing, thinning and micro-drilling the nail exist to get medicine deeper. They do not kill anything by themselves.
Why Half the Battle Is Proving It Is Fungus
A thick yellow nail is a symptom, not a diagnosis. AAD says another nail problem can look just like fungus. Nail psoriasis does. So does an old nail injury.
So the dermatologist takes a sample. A clipping, a scraping, or some of the buildup under the nail, looked at under a microscope. Cleveland Clinic adds that a negative first test can be sent for a culture.
Getting this wrong costs a year. A 48-week course aimed at psoriasis will do nothing, and the nail will still look wrong at the end of it.
It also picks the drug. AAD says the microscope view helps the dermatologist choose the best treatment, because the type of fungus matters.
Another nail condition, such as nail psoriasis or a nail injury, sometimes looks like nail fungus.
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⬇ Download your plan (PDF)Why the Nail Still Looks Wrong After the Fungus Dies
This is the part that makes people quit. AAD says the infection goes away in 6 to 12 weeks on oral terbinafine. The nail itself takes a year or longer to grow out.
Until it does, you will still see the discoloration and the other signs. The fungus can already be gone.
Reinfection is the other reason to keep going. AAD says nail fungus can come back a year or more after it clears, so dermatologists often prescribe a maintenance treatment afterward.
Prevention is dull and it works. The Mayo Clinic list is short. Trim nails straight across and keep them dry. Change socks through the day. Clean your clippers. Wear footwear in pools and locker rooms.
Three Nail Fungus Products That Cannot Deliver
Three things sold as cures, and what the evidence actually says.
Over-the-counter terbinafine cream. AAD answers this one with a flat no. The cream you can buy without a prescription is for skin, for things like athlete's foot. To treat a nail, the medicine has to get through the nail. A skin cream cannot.
Laser treatment as a cure. The FDA has approved laser to improve how a nail looks after the fungus has cleared. It has not approved any laser to treat the fungus. Cleveland Clinic says cure rates are lower than pills or prescription liquids, and AAD notes insurance rarely pays.
Tea tree oil and mentholated chest rub. Dermatologists have run small studies, and AAD says there may be some benefit. But the studies were small. We do not know how well these work, or what they can do wrong. That is not a cure.
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This article is education, not medical advice. If you have diabetes, circulation problems or a weakened immune system, or you see redness, pain or pus near a nail, that is a call to your provider rather than a trip to the drugstore aisle.