An ingrown toenail happens when the edge of your nail curves and presses into the surrounding skin, and it has a distinct look: the skin along one or both sides of the nail appears red or darker than usual, puffy, and slightly swollen over the nail border. In early stages it can be subtle, but as it progresses, the changes become hard to miss. Here’s how to identify one at each stage and what sets it apart from other toe problems.
Early Signs You Might Miss
In the earliest stage, an ingrown toenail doesn’t look dramatically different from a normal toe. What you’ll notice is mild puffiness along one side of the nail, where the skin of the nail fold looks slightly swollen compared to your other toes. The skin there may be pink or faintly red (or darker than your usual skin tone on darker complexions). It only hurts when you press on it or when a shoe pushes against it.
At this point, the nail edge itself may not be visibly buried. But if you look closely, the skin fold seems to be hugging the nail more tightly than it should, or it appears slightly raised where it meets the nail border. The nail may also curve downward more sharply at the edges than your other toenails. This is the stage where warm soaks, wearing roomier shoes, and gently lifting the nail corner with a small piece of cotton can sometimes resolve things on their own.
What a Moderate Ingrown Toenail Looks Like
Once an ingrown toenail progresses, the visual signs become much more obvious. The redness deepens and the swelling increases, so the skin fold on the affected side looks noticeably puffy and inflamed. You can often see the nail edge embedded in the swollen skin, like the flesh is growing over the corner of the nail. The toe may look wider or more bulbous on that side compared to the other.
At this stage, you’ll likely notice some drainage. This can range from clear or yellowish fluid to white or greenish pus, which may leave stains on your sock. The skin around the nail might feel warm or even hot to the touch. Pain is no longer limited to pressure; the toe can throb on its own, especially at night. The nail fold may measure a few millimeters higher than it normally would, creating a visible ridge of inflamed tissue alongside the nail.
Advanced Stage: Granulation Tissue
If an ingrown toenail goes untreated long enough, the body produces what’s called granulation tissue, sometimes referred to as “proud flesh.” This is probably the most alarming-looking stage. You’ll see a small, bead-like mound of raw, reddish or dark pink tissue growing out from the nail fold where the nail has been digging in. It’s soft, moist, and bleeds easily when bumped or touched.
This tissue forms because the body is trying to heal the wound the nail keeps creating, but the nail acts as a constant irritant, so healing never completes. The surrounding skin fold also thickens and hardens over time, a process called hypertrophy. At this point, the side of the toe can look significantly different from normal: swollen, discolored, weeping fluid, and partially covering the nail. This stage typically requires a minor procedure to remove the portion of nail causing the problem, along with the excess tissue.
How It Differs From Other Toe Infections
People sometimes confuse an ingrown toenail with paronychia, a bacterial infection of the skin around the nail. The key visual difference is location. An ingrown toenail causes swelling and pain specifically where the nail edge digs into the skin, usually on one side. If you look carefully, you can see the nail border pressing into or buried under the swollen fold. Paronychia, by contrast, affects the skin around the entire nail, including the cuticle area, and develops much faster, often within hours to a day or two. The nail edge isn’t embedded in the skin with paronychia; it’s the surrounding tissue that’s inflamed on its own.
Another condition that can look similar is a pincer nail, where the entire nail curves inward on both sides like a tube or a “C” shape. With a standard ingrown toenail, only the edge of the nail penetrates the skin. A pincer nail involves the whole nail progressively rolling inward and can affect both sides symmetrically, squeezing the nail bed underneath.
Signs the Infection Is Spreading
Most ingrown toenails stay localized to the nail fold, but an untreated infection can spread into the surrounding tissue of the toe or foot. If you notice redness expanding beyond the immediate nail area and creeping across the toe or onto the top of the foot, that’s a sign of cellulitis, a deeper skin infection. Other warning signs include fever, chills, red streaks running away from the toe, increasing warmth across the foot, and skin that looks dimpled or blistered.
A rapidly growing area of redness, especially with fever, is worth same-day medical attention. Even without those extreme signs, an ingrown toenail with pus, persistent drainage, or spreading redness that doesn’t improve over a few days has moved beyond the point where home care is likely to resolve it. People with diabetes or circulation problems should be especially attentive, since reduced blood flow to the feet makes infections harder to fight and easier to miss.
What Your Toe Should Look Like After Treatment
For mild cases managed at home, you should see the redness and swelling gradually fade over one to two weeks as the nail grows out past the skin fold. The skin returns to its normal color and the puffiness flattens.
If a partial nail removal is needed, the toe will look different immediately afterward. The treated side of the nail will be narrower, since the offending strip of nail has been removed. There will be some redness, mild drainage, and tenderness for the first week or two. Over the following weeks, the nail fold shrinks back to a normal size as inflammation resolves. If the nail root on that side was treated to prevent regrowth (a common approach for recurring ingrown nails), the nail will permanently remain slightly narrower, but the cosmetic difference is usually minor. Simple partial removal without treating the root has only about a 30% success rate for preventing recurrence, which is why many providers recommend the more permanent option for nails that keep coming back.