An ingrown toenail announces itself with pain and tenderness along one or both sides of the nail, usually on the big toe. The nail edge grows into the surrounding skin rather than over it, creating pressure that gets worse over days. Recognizing the signs early makes a real difference, because a mild ingrown nail you can manage at home can progress into an infected one that needs medical attention.
Early Signs to Watch For
The first thing most people notice is tenderness when they press the side of the toenail or when a shoe pushes against it. The skin along the nail edge looks slightly swollen and feels firm to the touch. At this point, the nail hasn’t broken the skin yet, so there’s no redness, no drainage, and the pain is more of an annoying soreness than anything sharp. You might only feel it when wearing closed-toe shoes or bumping the toe.
This early stage is easy to dismiss. Many people assume they just stubbed their toe or that the discomfort will pass. But if the tenderness sits right along the nail border and doesn’t improve in a few days, an ingrown nail is the likely cause.
When It Gets Worse: Redness, Swelling, and Pain
If the nail continues pressing into the skin, the area becomes visibly inflamed. The skin along the nail edge turns red, feels warm, and swells enough that you can see a clear difference compared to the other side of the nail. Pain shifts from something you notice occasionally to a constant, throbbing ache. Walking, especially in tight shoes, becomes genuinely uncomfortable.
At this stage, the nail has started to dig into or break through the soft tissue. The body responds with inflammation, and you may notice the skin starting to grow over or around the nail edge. This overgrowth of tissue is a hallmark of an ingrown nail getting worse. The surrounding skin can look puffy and almost bulge up around the nail border.
Signs of Infection
An ingrown toenail doesn’t always get infected, but when it does, the signs are hard to miss. The redness spreads beyond the immediate nail edge, the swelling increases, and you may see yellowish or white pus draining from the area. The skin feels hot to the touch, and the pain becomes sharp or throbbing even at rest.
In some cases, a small fluid-filled bump or abscess forms alongside the nail. This is your body walling off the infection. If the redness starts spreading further across the toe or up the foot, or if you develop a fever or chills, the infection may be moving into deeper tissue. This is a situation that needs prompt medical care rather than home treatment.
Left untreated for weeks, a chronically infected ingrown nail can, in rare cases, lead to infection in the underlying bone. Providers are advised to take X-rays when drainage has been present for four weeks or more to check for bone involvement. This is uncommon but worth knowing: a long-standing infected toenail isn’t just a nuisance.
What Causes It in the First Place
The most common cause is improper nail trimming. Cutting the nail too short or rounding the corners leaves a small spike of nail that digs into the skin as the nail grows forward. Cutting straight across, leaving the nail long enough that the corners sit above the skin, prevents this.
Tight-fitting shoes are the second major contributor. Shoes that compress the toes push the skin against the nail edge, creating the same effect as a nail growing inward. Athletic activity compounds this, because the repeated impact of running or jumping drives the nail further into the tissue. Excessive foot sweating softens the skin around the nail, making it easier for the nail to penetrate. Trauma to the toe, whether from stubbing it or dropping something on it, can also kick off the process.
Some people are simply more prone to ingrown nails because of their anatomy. Naturally wide nail plates, curved nails (sometimes called pincer nails), and congenital misalignment of the toenail all increase the risk. Thickened nails, which become more common with age and with fungal infections, are another structural factor.
Ingrown Nail vs. Other Toe Problems
Paronychia, an infection of the skin fold around the nail, looks similar to an infected ingrown toenail and can actually be caused by one. The key difference is that paronychia can affect any edge of the nail, including the cuticle area at the base, while an ingrown nail specifically involves the side border digging into skin. Paronychia also commonly affects fingernails, which ingrown nails rarely do.
A fungal nail infection can coexist with an ingrown nail and may even contribute to one by thickening and distorting the nail plate. But a fungal infection on its own typically causes discoloration (yellow, white, or brown nails), brittleness, and thickening without the localized pain and swelling along the nail edge that defines an ingrown nail. If your nail looks discolored and crumbly but doesn’t hurt along the sides, a fungal infection is more likely the issue.
Why Diabetes Changes the Picture
If you have diabetes, ingrown toenails deserve extra attention. Research on diabetic patients found that about 14% had ingrown nails, and nearly half of those with ingrown nails also had peripheral arterial disease, meaning reduced blood flow to the feet. Poor circulation slows healing and raises infection risk significantly.
Diabetes also causes nerve damage in the feet over time, which means you might not feel the early pain signals that would normally alert you to an ingrown nail. By the time you notice something is wrong, the nail may already be infected. Higher body mass index, previous toe trauma, and thickened nails were all independent risk factors for ingrown nails in diabetic patients. Regular foot checks, either on your own or with a provider, are essential for catching problems before they escalate.
Home Care vs. Professional Treatment
A mildly ingrown nail, one that’s tender and slightly swollen but shows no signs of infection, often responds to home care. Soaking the foot in warm water for 15 to 20 minutes a few times a day softens the skin and reduces swelling. Wearing open-toed shoes or sandals takes pressure off the area. Some people gently place a small piece of cotton or dental floss under the nail edge to encourage it to grow above the skin, though this needs to be done carefully to avoid pushing bacteria deeper.
If home care hasn’t improved things after several days, or if the nail is already inflamed with pus and significant pain, professional treatment is the next step. For a moderately ingrown nail, a provider can numb the toe and trim away the portion of nail that’s embedded in the skin. This gives immediate relief and allows the tissue to heal.
For ingrown nails that keep coming back on the same toe, a more permanent option involves removing part of the nail along with the underlying growth tissue so that section of nail doesn’t regrow. This can be done with a chemical agent, laser, or other methods, and it’s performed under local anesthesia in an office visit. Recovery is straightforward, and the recurrence rate drops significantly.