An ingrown toenail happens when the edge of a toenail grows into the skin beside it. The most common sign is pain and tenderness along one side of the nail, often with redness and swelling. You can usually recognize it by looking at the nail edge and pressing gently on the skin next to it — if that spot hurts sharply and looks inflamed, an ingrown toenail is likely.
How Do I Know If I Have An Ingrown Toenail?
The diagnosis is usually made by looking at and examining the toe. No blood test or imaging is needed in most cases.
Doctors identify an ingrown toenail by its appearance and by where it hurts. The pain is typically along the side of the nail, not across the whole toe. Pressing on the swollen skin next to the nail edge usually causes a sharp, specific pain.
Here is what clinicians look for:
- Pain along one or both sides of the nail, especially when pressure is applied
- Redness, swelling, and warmth in the skin next to the nail
- Tenderness that is worse when wearing shoes or socks
- Sometimes a small amount of pus or drainage
- Extra skin tissue growing over the nail edge in longer-standing cases
The big toe is affected most often, but any toe can develop one. The condition is common in teenagers and young adults, though it can happen at any age.
One useful distinction: an ingrown toenail hurts most at the side of the nail. Other toe problems, like a corn or a blister, tend to hurt on the top or tip of the toe. A fungal nail infection usually changes the nail’s color and thickness without causing sharp side-of-nail pain.
What Does an Ingrown Toenail Look Like Compared to Other Toe Problems?
Ingrown toenails have a fairly recognizable appearance, but they can be confused with a few other conditions. Knowing the differences helps you decide what to do next.
An ingrown toenail typically shows:
- Redness and swelling confined to the skin beside the nail
- The nail edge pressing into or curling toward the skin
- Possible yellow or white drainage if infection has set in
- Skin that looks shiny or tight over the swollen area
Compare that to other common toe issues:
| Condition | Typical Appearance | Where It Hurts |
|---|---|---|
| Ingrown toenail | Red, swollen skin beside the nail edge | Along the side of the nail |
| Fungal nail infection | Thick, discolored, crumbly nail | Usually not painful unless severe |
| Corn or callus | Hard, thickened skin | Top or tip of the toe |
| Gout | Sudden redness and swelling of the whole joint | Entire toe joint, often the big toe base |
Gout deserves a mention because it can look similar at first. Gout causes sudden, intense pain and swelling in a joint — most often the base of the big toe. An ingrown toenail causes pain at the nail edge, not the joint. If the whole toe is swollen and hot and the pain came on suddenly, that points more toward gout or another joint problem.
If you are not sure which condition you have, a doctor or nurse can tell the difference with a simple exam.
What Causes an Ingrown Toenail?
Ingrown toenails happen when the nail edge presses into the surrounding skin. Several things make that more likely.
The most common causes are:
- Improper nail trimming. Cutting nails too short or rounding the corners instead of cutting straight across encourages the edge to grow into the skin.
- Shoe pressure. Shoes that are too tight or too narrow push the toe against the nail.
- Injury. Stubbing your toe or dropping something on it can change how the nail grows.
- Nail shape. Naturally curved or fan-shaped nails are more prone to ingrowing.
- Genetics. Ingrown toenails often run in families.
Some health conditions raise the risk. Diabetes can affect circulation and nerve sensation in the feet, which makes foot problems more serious and slower to heal. Repeat ingrown toenails are also more common in people whose nails naturally curve inward.
Activities that jam the toes — like soccer, running, or wearing tight cleats — increase the chance of developing one. So does standing for long periods in poorly fitted shoes.
When Should You See a Doctor for an Ingrown Toenail?
See a doctor if the toe is infected, if you have diabetes or poor circulation, or if home care has not helped after a few days.
Signs that suggest infection include:
- Spreading redness or warmth
- Pus or foul-smelling drainage
- Increasing pain
- Fever or feeling unwell
People with diabetes should not try to treat an ingrown toenail at home. Reduced sensation in the feet means you might not feel how much damage you are causing. Reduced circulation means infections heal slowly and can become serious. For anyone with diabetes, a foot problem like this warrants prompt medical attention.
The same caution applies to people with poor circulation, peripheral artery disease, or a weakened immune system.
For everyone else, a mild ingrown toenail that is not infected can often be managed at home. If it is not improving after a few days of careful care, or if it keeps coming back, a doctor can help. Recurring ingrown toenails sometimes need a minor procedure to remove part of the nail or the tissue that keeps producing the problem.
How Is an Ingrown Toenail Treated?
Treatment depends on how severe the ingrown toenail is and whether it is infected.
For mild cases without infection, home care focuses on reducing pressure and preventing the nail from digging in further:
- Soak the foot in warm water for short periods
- Keep the toe clean and dry between soaks
- Wear shoes with a wide toe box
- Avoid trimming the nail shorter — let it grow past the skin edge
- Gently lift the nail edge with clean cotton if a clinician advises it
Some clinicians suggest placing a small piece of cotton or dental floss under the nail edge to help it grow above the skin. This is common practice, but the evidence for how well it works on its own is limited. It is best done with guidance from a healthcare provider, especially if the area is already inflamed.
For infected or persistent cases, a doctor may:
- Prescribe antibiotics if there is a bacterial infection
- Remove the ingrown portion of the nail
- Use a chemical or surgical method to prevent that part of the nail from growing back
Removing part of the nail is a common office procedure. It is done with local numbing, so it is not painful during the procedure. The nail often grows back, and in some cases the procedure is repeated or a more permanent option is used.
No treatment is guaranteed to prevent the nail from ever ingrowing again. Recurrence is possible, especially if the underlying cause — like nail shape or tight shoes — is not addressed.
Can You Prevent an Ingrown Toenail?
Good nail care and well-fitting shoes reduce the risk, though some people are simply prone to them because of nail shape or genetics.
Prevention steps that make sense:
- Cut toenails straight across, not rounded at the corners
- Do not cut nails shorter than the tip of the toe
- Wear shoes with enough room in the toe box
- Keep feet clean and dry
- Wear protective footwear during activities that risk toe injury
If you have diabetes, regular foot checks are part of routine care. Looking at your feet daily — including between the toes — helps catch problems early, when they are easier to treat.
Some people inherit a nail shape that curves inward no matter how carefully they trim. For them, prevention is about managing pressure and catching problems early rather than avoiding them entirely.
Frequently Asked Questions
How do I know if my ingrown toenail is infected?
Signs of infection include spreading redness, warmth, pus or drainage, increasing pain, and sometimes fever. A mild ingrown toenail without these signs is usually not infected.
Will an ingrown toenail go away on its own?
A mild one can improve with home care that reduces pressure on the nail edge. If it is infected, keeps returning, or you have diabetes, see a doctor rather than waiting.
Should I cut the corner of my ingrown toenail out?
No. Cutting the corner shorter often makes it worse by encouraging the nail to grow back into the skin. Trim nails straight across and let the edge grow past the skin.
When should I see a doctor for an ingrown toenail?
See a doctor if there are signs of infection, if you have diabetes or poor circulation, or if home care has not helped after a few days. Recurring ingrown toenails also warrant a medical visit.
