In almost all cases, yes, a dead toenail will grow back. The nail-producing tissue sits beneath the skin at the base of your toe, and as long as that tissue is intact, it will push out a new nail. The full process is slow, though. Most toenails take 12 to 18 months to completely regrow, and some take up to two years depending on what caused the nail to fall off in the first place.
Why Toenails Fall Off
A toenail dies and detaches when something disrupts the connection between the nail plate and the skin underneath. The most common cause is blunt trauma: stubbing your toe, dropping something heavy on it, or repetitive pressure from tight shoes or long-distance running. In these cases, blood pools beneath the nail, the nail darkens, and it eventually loosens and falls off over a period of weeks.
Fungal infections are another frequent cause. A fungus invades the nail, thickening and discoloring it until the nail crumbles or separates from the nail bed. Other causes include psoriasis, bacterial infections, and certain systemic illnesses. In children, hand-foot-and-mouth disease is a well-known trigger. Parents often notice their child’s nails shedding one to two months after the illness. Some medications, particularly chemotherapy drugs, can also temporarily shut down nail production and cause shedding.
There are two distinct patterns of nail loss. In one, the nail separates starting from the tip and works its way back, but the root stays connected and the nail doesn’t fully shed. In the other, the separation starts at the base, where the growth center is, and the entire nail eventually comes off. This second type is more common after injuries and systemic illness, and it’s the one people typically mean when they say their toenail “fell off.”
What Controls Whether It Grows Back
The key structure is a crescent-shaped pocket of cells at the base of your toe called the nail matrix. About 90% of your nail’s growth comes from this tissue. It continuously produces new cells that harden into the nail plate you see. A second layer of tissue underneath, called the sterile matrix, contributes the remaining 10% of growth and is mainly responsible for keeping the nail attached to the skin below it.
After a toenail falls off, the matrix usually heals on its own and begins producing a new nail. Permanent nail loss only happens when the matrix itself is severely scarred or destroyed, and that’s rare. It typically requires a crushing injury, a deep laceration, or a surgical procedure that intentionally removes the matrix to prevent regrowth (sometimes done for chronic ingrown toenails). If your nail fell off from a stubbed toe, a fungal infection, or an illness, the matrix is almost certainly fine.
How Long Full Regrowth Takes
Toenails grow at roughly 1.6 millimeters per month, which is less than half the speed of fingernails. A big toenail that needs to regrow from scratch has a lot of ground to cover, so the timeline is measured in months, not weeks.
Here’s what to expect based on the cause:
- After trauma: 6 months to 2 years. The wide range depends on how much damage occurred to the nail bed and matrix.
- After a fungal infection: 12 to 18 months. Fungal nails grow more slowly than healthy ones while the infection is active, but growth rate returns to normal once the infection clears.
- After medical removal: Up to 18 months for full regrowth.
- After psoriasis: 6 months or longer, depending on how well the underlying condition is managed.
The new nail will look thin and slightly translucent at first. It may have ridges or a rough texture in the early months, especially if the nail bed sustained any scarring. For most people, the nail gradually thickens and smooths out as it reaches full length.
Signs the Matrix May Be Damaged
If the growth center sustained significant scarring, the new nail may not come back normally. Instead of a smooth, uniform nail, you might see a permanent ridge running lengthwise, a split down the middle, or a nail that grows in two separate pieces. These deformities happen because scar tissue in the matrix can’t produce nail cells. The surrounding healthy tissue keeps growing, but the gap where the scar sits creates visible distortions.
A narrow scar usually causes only a cosmetic issue. A wider scar can produce a nail that doesn’t adhere properly to the skin beneath it, making it loose and prone to catching on things. If several months have passed and you see no sign of new growth at all, that could indicate more extensive matrix damage. A dermatologist or podiatrist can evaluate whether the matrix is still functional.
Caring for the Exposed Nail Bed
Once a toenail falls off, the skin underneath is tender and vulnerable. For the first 24 to 48 hours, keep the bandage dry and the toe elevated above heart level when you’re sitting or lying down. This reduces swelling and throbbing.
After that initial period, gently wash around the area with clean water twice a day and apply a fresh bandage. When showering, cover the toe with a plastic bag until the exposed skin has toughened up. The nail bed will gradually harden over a few weeks, but it remains more sensitive than the surrounding skin for much longer. Wearing roomy, closed-toe shoes during this period protects the area from bumps and pressure.
Watching for Infection During Regrowth
An exposed nail bed is an open invitation for bacteria. Signs of infection include increasing pain and swelling around the base or sides of the toe, skin that’s red and warm to the touch, and pus collecting under the skin. If a white or yellow abscess forms, it may need to be drained and treated with antibiotics.
Mild redness in the first day or two is normal. But if symptoms get worse rather than better after 48 hours, or if you develop a fever, that warrants prompt medical attention. People with diabetes, poor circulation, or weakened immune systems should treat any signs of infection around the nail as urgent, since healing is slower and complications are more likely in those situations.
Preventing Ingrown Nails During Regrowth
As the new nail pushes forward, it can dig into the surrounding skin, especially along the edges. The skin has had months to close in over the nail bed, and the thin new nail sometimes follows the path of least resistance into that overgrown tissue rather than growing straight out.
You can reduce the risk by keeping the skin pulled slightly back from the nail’s path. Placing a small piece of clean cotton or waxed dental floss under the leading edge of the new nail encourages it to grow over the skin rather than into it. Replace the cotton daily after soaking your foot in warm water. If the nail does start growing inward and becomes painful, taping the skin away from the nail edge is a simple technique that often resolves the problem without any procedure.