When a toenail falls off, the exposed nail bed underneath is tender and sensitive, but in most cases a new nail will grow back on its own. Full regrowth takes an average of 12 to 18 months, and the nail bed needs consistent protection during that time to heal properly and avoid infection.
Why Toenails Fall Off
The most common reason is trauma: stubbing your toe hard, dropping something heavy on it, or wearing shoes that are too tight. Runners and hikers frequently lose toenails because of repetitive pressure against the front of the shoe. That repeated impact can cause blood to pool under the nail, eventually loosening it from the nail bed beneath.
Fungal infections are another leading cause. Fungus works its way between the nail and the nail bed through small cracks, thickening and yellowing the nail over time. Eventually the nail separates and falls off. Other causes include reactions to chemicals in nail polish or nail hardener, certain medications (especially chemotherapy drugs), and skin conditions like psoriasis. Sometimes the nail loosens gradually over weeks, other times it comes off suddenly after an injury.
What the Nail Bed Looks Like
Once the nail is gone, you’re looking at the nail bed: a pinkish, soft layer of skin that normally sits under the nail plate. It’s sensitive because it wasn’t designed to be exposed. You may notice some dried blood if the loss was caused by trauma, or the skin may look slightly raw and damp. This is normal.
Over the first few days, the exposed nail bed begins to dry out and firm up. If the nail bed stays uncovered for an extended period without a new nail growing over it, the skin can harden and develop a texture similar to the skin on the tip of your finger or toe. This process, called keratinization, is the body’s way of protecting the area, but it can sometimes make it harder for a new nail to reattach properly as it grows in.
How to Care for an Exposed Nail Bed
If part of the nail is still hanging on, you can trim the detached portion with clean scissors. File down any sharp edges so they don’t catch on socks or bandages. If the nail just fell off cleanly, skip straight to cleaning.
Soak the toe in cold water for 20 minutes right after losing the nail. Then apply a thin layer of petroleum jelly (like Vaseline) and cover the area with a non-stick bandage. For the first three days, soak your foot two or three times daily in a warm saltwater solution: one teaspoon of salt dissolved in four cups of warm water, for 20 minutes per soak. After each soak, reapply petroleum jelly and a fresh bandage.
Keep following this routine until the nail bed feels firm or the new nail has grown in. Replace the bandage any time it gets wet. The goal is simple: keep the area clean, moist enough to heal (that’s what the petroleum jelly does), and protected from bacteria.
How Long Regrowth Takes
Toenails grow slowly. The average rate is about 1.6 millimeters per month, which is less than half the speed of fingernails. A full toenail takes up to 18 months to grow back completely, and if the loss was caused by trauma, it can take anywhere from 6 months to 2 years.
You’ll first notice a thin, slightly translucent nail emerging from the base of the toe. It may look ridged, uneven, or discolored at first. This is common and usually improves as the nail continues to grow out. The new nail pushes forward from the nail matrix, a small pocket of cells tucked under the skin at the base of your toe. As long as that matrix is intact, a new nail will eventually form.
Big toenails take the longest because they have the most surface area to cover. Smaller toenails can regrow somewhat faster but still take many months. During this period, wearing open-toed shoes or roomy footwear helps avoid pressure on the healing toe.
Signs of Infection to Watch For
An exposed nail bed is vulnerable to bacteria, so it’s worth knowing what infection looks like. The key warning signs are:
- Increasing redness and warmth around the toe, especially if it’s spreading rather than fading over the first few days
- Swelling and throbbing pain that gets worse rather than better
- Pus buildup under the skin, which may appear as a white or yellow abscess near the nail bed
- A foul smell or greenish discoloration of the skin or any remaining nail
An untreated infection can cause the new nail to grow in abnormally, with ridges, waves, or a brittle, dry texture. If you notice any of these signs, it’s worth getting the toe looked at before the infection worsens or reaches the bone.
When the Nail May Not Grow Back Normally
Most lost toenails do grow back, but the new nail doesn’t always look the same as the original. Minor trauma usually produces a nail that returns to normal within one or two growth cycles. More significant injuries, like a crushing blow or a deep cut at the base of the toe, can damage the nail matrix. Since the matrix is the factory that produces nail cells, damage there can cause permanent changes: chronic thickening, uneven or wavy growth, discoloration, or a rough texture that doesn’t smooth out over time.
In rare cases where the matrix is severely destroyed, the nail may not grow back at all. This is uncommon with everyday injuries but can happen with serious trauma or repeated surgical removal. If your nail has been gone for well over a year with no sign of regrowth, or if the new nail keeps growing in painfully deformed, a podiatrist can evaluate the matrix and discuss options.
What to Expect Day by Day
The first few days are the most uncomfortable. The nail bed is tender, and even light contact with bedsheets or socks can sting. Keeping the area bandaged helps enormously. By the end of the first week, the nail bed typically firms up and the sensitivity decreases noticeably.
Within two to four weeks, you may see the very beginning of a new nail at the base of the toe. It often looks thin, fragile, and slightly opaque. Resist the urge to pick at it. Over the following months, the nail slowly extends forward. By three to six months, you’ll likely have partial coverage. Full coverage, where the nail reaches the tip of the toe again, usually takes 12 to 18 months. The nail may continue to thicken and normalize in appearance for a few months even after it reaches full length.
During the entire regrowth period, keep the toe clean, avoid tight shoes, and trim the new nail carefully as it grows to prevent it from catching or tearing before it’s fully attached.