An infected ingrown toenail typically shows redness and swelling along the side of the nail, often with yellow or white pus oozing from where the nail digs into the skin. The surrounding skin looks puffy, feels warm to the touch, and may appear shiny or tight from inflammation. As the infection worsens, you might notice the skin darkening to a deeper red or even purplish tone, with the swollen area growing larger and more tender.
Early Signs Before Infection Sets In
Before an ingrown toenail becomes infected, it goes through a milder stage that’s easy to overlook. The skin along one or both sides of the nail becomes slightly swollen and pink. It hurts when you press on it or when your shoe pushes against it, but there’s no pus and no major color change. The nail edge may be visibly curving into the skin fold, and the area might look a little puffier than the same spot on your other toe.
This is the stage where home care is most effective. Soaking the foot in warm water, gently lifting the nail edge, and wearing roomier shoes can keep things from progressing. But once bacteria enter through the broken skin, the appearance changes quickly.
What Infection Actually Looks Like
Once bacteria take hold, the area around the ingrown nail transforms in ways that are hard to miss. The redness intensifies and spreads beyond the immediate nail fold, sometimes extending across the top of the toe. Swelling increases noticeably, and the skin can look stretched and glossy. The most telling visual sign is discharge: a yellowish or whitish fluid (pus) seeping from the crease where the nail meets the skin. You might see it on your sock or notice a small crusty buildup along the nail edge after sleeping.
At a moderate stage, the nail fold may develop a small open sore or ulcer where the nail has been cutting into the tissue. The drainage at this point often becomes thicker and cloudier. Some people describe the fluid as slightly greenish, which can happen when specific types of bacteria are involved. The toe feels warm compared to your other toes, and the pain shifts from pressure-only to a constant, throbbing ache.
In severe cases, the infection produces a distinctive overgrowth of bumpy, reddish tissue called granulation tissue. This looks like a small, raw, bead-like lump of wet, reddish or dark pink flesh bulging out from the nail fold. It bleeds easily when touched. The nail fold itself becomes significantly thickened and enlarged, and the discharge is clearly pus-filled. At this point, the nail edge is often buried so deeply in swollen tissue that it’s barely visible.
How It Differs From a Fungal Nail Infection
People sometimes confuse an infected ingrown toenail with a fungal nail infection because both involve discoloration and changes to the toe. The differences are straightforward once you know what to look for.
- Location of changes: An ingrown nail infection affects the skin alongside the nail. A fungal infection affects the nail itself, often starting as a white or yellow-brown spot under the nail tip.
- Nail texture: Fungal infections make the nail thickened, crumbly, brittle, or misshapen over weeks to months. An infected ingrown nail leaves the nail plate itself looking relatively normal.
- Pain and swelling: Ingrown nail infections are painful and visibly swollen. Fungal infections are typically painless, at least early on.
- Speed: An ingrown nail infection develops over days. A fungal infection develops over weeks or months.
- Discharge: Pus and fluid are hallmarks of an infected ingrown nail. Fungal infections don’t produce pus, though the nail may separate from the nail bed and have an unpleasant smell.
If the nail itself looks green or black, that points more toward a bacterial or fungal colonization of the nail plate rather than a typical ingrown nail infection.
Signs the Infection Is Spreading
Most infected ingrown toenails stay localized to the toe, but in some cases the infection can move deeper or wider. Red streaks extending from the toe toward the foot are a serious warning sign, as they suggest the infection is tracking along tissue or lymph channels. Other signs include swelling that extends well beyond the toe, the entire foot feeling warm, or developing a fever.
In rare, chronic cases, an untreated infection can spread from the soft tissue into the bone of the toe. This is uncommon in otherwise healthy people, but it’s a real risk for anyone with compromised circulation or immune function.
Why Diabetes Changes the Picture
If you have diabetes, an infected ingrown toenail carries significantly higher stakes. Diabetes reduces blood flow to the feet and can damage the nerves that sense pain, which means you might not notice the early warning signs of swelling and tenderness. By the time you spot the infection visually, it may already be more advanced than it appears.
An ingrown toenail in someone with diabetes can develop into a diabetic foot ulcer, an open wound that heals slowly because of poor circulation. These ulcers are prone to deep infection and, without proper treatment, can lead to serious complications including gangrene and, in severe cases, amputation. This is why even a mildly ingrown toenail in a person with diabetes warrants professional attention rather than home treatment.
What Treatment Looks Like at Each Stage
For a mild ingrown nail with no signs of infection, warm soaks, proper trimming, and better-fitting shoes are usually enough. You can gently place a small piece of cotton or dental floss under the nail edge to encourage it to grow above the skin fold.
Once infection is present, with visible pus, spreading redness, or an open sore, a healthcare provider will typically numb the toe and trim or remove the portion of nail that’s digging into the skin. This is a quick in-office procedure. For moderate to severe cases, or when the problem keeps coming back, a partial nail removal with a chemical treatment to the nail root prevents that section of nail from regrowing. Recurrence rates drop significantly with this approach compared to simply trimming the nail.
The key visual threshold for seeking care: if you see pus, if the redness is spreading beyond the nail fold, or if you notice that raw, bumpy tissue forming alongside the nail, home remedies are no longer the right call.