Fixing toenails depends on what’s wrong with them, but most common problems fall into a handful of categories: fungal infections that discolor or thicken the nail, ingrown edges that dig into skin, damage from injury, or nails that have become brittle and prone to splitting. Each has a different fix, and some take patience. A full toenail can take up to 18 months to regrow from the cuticle to the tip, so even effective treatments require months before you see the final result.
Fixing Fungal Toenails
Fungal nail infections are the most common reason toenails look thick, yellow, crumbly, or warped. The fungus lives under and within the nail plate itself, which is why it’s so stubborn to treat. Over-the-counter topical antifungals you find at the drugstore rarely penetrate deep enough to clear the infection on their own.
Prescription oral antifungals are the most effective option. A 12-week course of terbinafine clears toenail fungus in 38% to 76% of cases, making it the first-line choice for most providers. Itraconazole, another oral option, has cure rates between 14% and 63%. These medications work systemically, reaching the nail bed through your bloodstream, which is why they succeed where topical treatments often fail.
Prescription topical treatments do exist, but their cure rates are significantly lower. Efinaconazole, one of the better-performing options, cures only about 15% to 18% of cases even after 48 weeks of daily application. Standard topical lacquers like ciclopirox clear the infection in roughly 6% to 9% of cases. Topicals can be reasonable for mild infections affecting less than half the nail, or when oral medications aren’t safe due to liver concerns or drug interactions.
For thickened fungal nails, a 40% urea paste applied under a bandage can soften and thin the nail plate over time. You apply it daily or every couple of days, ideally after a shower when the nail is already softened. This doesn’t kill the fungus, but it makes the nail more manageable and helps topical antifungals penetrate better.
Laser treatment has generated interest as a fungal nail fix. Results from clinical trials vary wildly, from 0% to 100% success depending on the study, laser type, and how “success” is measured. A 2024 meta-analysis found laser therapy outperformed oral terbinafine statistically, but the results had wide confidence intervals, meaning the true benefit is still uncertain. Laser treatment is typically not covered by insurance.
Fixing Ingrown Toenails
An ingrown toenail happens when the edge of the nail curves into the surrounding skin, causing pain, redness, and sometimes infection. Mild cases often respond well to home care over a week or two.
The Mayo Clinic recommends soaking the affected foot in warm, soapy water for 10 to 20 minutes, three to four times a day. After each soak, tuck a small piece of clean cotton or waxed dental floss under the ingrown edge. This gently lifts the nail and encourages it to grow above the skin rather than into it. Replace the cotton after each soak. Apply petroleum jelly to the tender area and bandage the toe to reduce friction.
If the area becomes increasingly red, swollen, or starts draining pus, the infection has progressed beyond what home care can handle. A podiatrist can numb the toe and remove the ingrown portion of the nail. For nails that repeatedly grow inward, a small section of the nail matrix (the root) can be permanently treated so that strip of nail never regrows.
Fixing a Bruised or Damaged Nail
Stubbing your toe hard or dropping something on it can cause blood to pool under the nail, turning it dark purple or black. For minor bruising, wrapping ice in a towel and applying it to the toe is often enough. But if the dark area keeps spreading or the pain worsens rather than fading, you need professional care.
A provider can drain the trapped blood through a small hole in the nail plate, a procedure called trephination. This works best within 24 to 48 hours of the injury. If you skip draining a painful hematoma, the pressure can cause permanent nail damage including ridges, splitting, shape changes, or complete nail loss.
More serious injuries, where the nail has split, separated from the nail bed, or involves a deep cut, may require removing the nail plate entirely so the underlying tissue can heal properly. Only a healthcare provider should drain or remove a damaged nail. Attempting it yourself risks infection and further damage.
If you do lose a toenail entirely, expect the regrowth process to take 12 to 18 months. The nail grows from the matrix at the base, and toenails grow much more slowly than fingernails. The new nail may look slightly different in texture or thickness at first but typically normalizes over time.
Fixing Brittle, Splitting Nails
Toenails that crack, peel, or split easily are often a result of repeated moisture exposure (wet then dry cycles), aging, or nutritional gaps. Biotin supplementation has the best evidence for improving nail strength. In clinical studies, 2.5 mg of biotin taken daily for roughly 6 months increased nail thickness by 25% in patients with brittle nails. In another study using the same dose, 91% of participants with thin, brittle nails reported firmer, harder nails after an average of 5.5 months.
Beyond supplementation, keeping nails moisturized helps. Applying a thick cream or petroleum jelly to nails and cuticles after bathing locks in moisture. Avoid prolonged soaking when it’s not medically necessary, and wear gloves or protective footwear when working in wet environments. If brittleness is severe or came on suddenly, it’s worth checking for thyroid issues or iron deficiency, both of which can affect nail quality.
Trimming to Prevent Future Problems
Poor trimming technique causes or worsens many toenail problems, especially ingrown nails. Cut your toenails straight across rather than rounding the corners or cutting at an angle. A square shape prevents the edges from curving into the skin as they grow. After cutting, use a nail file to gently smooth any sharp corners so they don’t catch on socks or shoes.
Resist the urge to cut nails as short as possible. Leave a small visible strip of white nail at the free edge. Cutting too short exposes the sensitive skin underneath and makes it easier for the nail to dig into surrounding tissue as it grows out. Trim after a bath or shower when nails are softer and less likely to crack. Use proper toenail clippers rather than fingernail clippers, since toenail clippers have a wider, straighter blade suited to thicker nails.
Wearing shoes with enough room in the toe box also matters. Tight shoes press toenails into skin constantly, which promotes ingrown nails and can worsen fungal infections by creating a warm, compressed environment. If your toenails frequently hit the front of your shoes, you likely need a half size up or a wider fit.