An ingrown toenail starts as a subtle curve of the nail pressing into the surrounding skin, usually along one or both sides of the big toe. In its earliest stage, you’ll notice the skin next to the nail edge looks pink or red and feels slightly swollen. As it progresses, the appearance changes significantly, from mild puffiness to visible infection and, in severe cases, fleshy tissue growing over part of the nail itself.
What It Looks Like Early On
The first visual sign is easy to miss. The skin along one side of the toenail becomes slightly puffy and pink. It doesn’t look dramatically different from a normal toe, but you’ll feel tenderness when you press on it or when a shoe puts pressure on it. The nail edge may appear to dig slightly into the skin fold beside it, though this can be hard to see without looking closely.
At this point, the area feels hard and swollen to the touch. The nail itself looks normal. There’s no drainage, no broken skin, and no obvious redness spreading beyond the immediate nail edge. Many people at this stage assume they just have a sore toe and don’t connect it to the nail until the symptoms get worse.
Moderate Stage: Redness, Swelling, and Drainage
If the nail continues growing into the skin, the appearance changes noticeably. The skin fold beside the nail becomes visibly red (or darker in color on darker skin tones), swollen, and warm to the touch. The swelling makes the skin look like it’s starting to push up and over the edge of the nail. This is the point where most people look down at their toe and realize something is wrong.
Infection often sets in during this stage. You may see white or yellowish discharge seeping from where the nail meets the skin. The area can look wet or crusty depending on whether drainage is fresh or dried. The surrounding skin feels tender even without pressure, and wearing closed-toe shoes becomes uncomfortable or painful. The redness is typically contained to the toe itself, concentrated around the nail fold where the nail is cutting in.
Severe Stage: Tissue Overgrowth
Left untreated, an ingrown toenail enters its most visually striking phase. The hallmark of a severe ingrown nail is granulation tissue, sometimes called “proud flesh.” This is bumpy, raw-looking tissue that forms along the nail edge. It’s red or dark pink, moist, bleeds easily, and looks like a small mound of soft, fleshy material growing where the nail meets the skin.
At the same time, the skin fold beside the nail becomes thickened and overgrown, sometimes partially covering the nail edge. The toe looks noticeably larger than normal due to the combined swelling and tissue buildup. Pus discharge is common, and the entire area around the nail can appear angry and inflamed. The nail itself may be partially hidden under swollen skin, making it hard to see the original problem. This stage typically requires professional treatment rather than home care.
How to Tell It Apart From Other Nail Problems
An ingrown toenail looks similar to a few other conditions, and telling them apart matters because the treatment differs.
Paronychia is a skin infection around the nail that can look nearly identical: red, swollen, painful skin with pus buildup. The key visual difference is location. An ingrown toenail causes symptoms specifically along the side of the nail where the edge is digging in. Paronychia typically affects the nail fold at the base of the nail (the cuticle area) or wraps more broadly around the nail. Paronychia can also cause the nail itself to change, developing ridges, a yellow or green discoloration, or a dry, brittle texture. An ingrown toenail doesn’t change how the nail looks on its surface.
A fungal nail infection can cause thickened, discolored nails that press into surrounding skin, sometimes mimicking an ingrown nail. But fungal infections change the nail’s color and texture (yellow, crumbly, thickened) without the acute redness and swelling along a single nail edge that defines an ingrown nail.
What Each Part of the Toe Tells You
- Nail edge: In a true ingrown nail, you can often see (or feel) the corner or side of the nail curving downward into the skin. Sometimes the nail edge is buried under swollen skin and invisible.
- Skin fold (lateral nail fold): This is the strip of skin running alongside the nail. Redness, swelling, and tenderness here are the primary visual markers. In severe cases, this tissue becomes thickened and overgrown.
- Discharge: Clear fluid suggests early inflammation. White or yellow discharge signals infection. Blood-tinged drainage often comes from granulation tissue in the severe stage.
- Skin color changes: On lighter skin, expect pink-to-red inflammation. On darker skin, the affected area may appear darker than the surrounding skin rather than classically “red,” and warmth and swelling become more reliable visual cues than color alone.
Which Toes Are Affected
The big toe is by far the most common location, and most ingrown nails develop on the outer edge (the side facing away from the other toes). However, they can occur on either side of any toenail. When you’re checking your feet, look at both edges of the big toenails first, then scan the smaller toes if you’re feeling pain that doesn’t match up.
Why It Matters More for Some People
If you have diabetes or poor circulation in your feet, an ingrown toenail can look deceptively mild while hiding a more serious problem underneath. Reduced sensation from nerve damage means you might not feel pain proportional to the severity of the infection. The visual signs, redness, swelling, warmth, drainage, become your primary warning system. Any visible sign of an ingrown nail in someone with diabetes warrants professional care rather than home treatment, because infections in poorly circulating tissue can escalate quickly and heal slowly.