An ingrown toenail happens when the edge of your nail grows into the skin alongside it, and the first sign is usually a sharp or aching pain along one side of your toe, especially when you press on it or wear shoes. The big toe is the most common spot. If you’re wondering whether that’s what you’re dealing with, there are clear visual and physical signs at every stage that can help you figure it out.
What an Early Ingrown Toenail Looks and Feels Like
In the earliest stage, the skin along the edge of your toenail becomes red (or darker than usual on deeper skin tones), slightly swollen, and tender. The area may feel hard to the touch. Pain is typically localized to one side of the nail, not the whole toe, and it gets worse when something presses against it, like the inside of a shoe or a bedsheet.
You can do a simple check at home: gently press along each side of the toenail with your fingertip. If one side is noticeably more painful, swollen, or firm compared to the other side or to the same toe on your other foot, that’s a strong indicator. Look closely at the nail border. You may notice the skin is puffier than normal and starting to ride up against or over the edge of the nail. The toe will look different from your other toes, even if only subtly.
Signs It’s Getting Worse
Ingrown toenails progress in a predictable way if they aren’t addressed. In the second stage, the nail digs further into the skin, creating a small wound. Your body responds by producing drainage, a mix of clear fluid and pus. The swelling and tenderness increase, and you may notice new, raw-looking tissue forming at the nail edge. This puffy, reddish tissue is called granulation tissue, and it bleeds easily if bumped.
In the most advanced stage, the infection becomes chronic. The granulation tissue grows larger, sometimes climbing over the nail itself. The toe oozes pus consistently, and the surrounding skin stays inflamed. At this point, the condition won’t resolve on its own.
How to Tell If It’s Infected
Not every ingrown toenail gets infected, but bacteria can enter once the nail breaks through the skin. Signs of infection include:
- Pus or cloudy fluid leaking from the side of the nail
- Increased redness or darkening that spreads beyond the immediate nail edge
- Warmth when you touch the toe, noticeably warmer than your other toes
- Throbbing pain that persists even without pressure
If the redness and swelling start traveling up the toe or into the foot, or if you develop a fever or feel unusually tired, the infection may have spread into deeper layers of skin. This is called cellulitis, and it needs prompt medical attention, particularly for people with diabetes or poor circulation in their feet.
Ingrown Toenail vs. Other Toe Problems
A few other conditions can cause a painful, red toe, so it helps to know the differences.
A fungal nail infection looks quite different. The nail itself changes color, turning yellow, brown, or developing white spots. It thickens, crumbles when you cut it, and may lift away from the nail bed. There’s often a bad smell underneath the nail. The pain is usually mild or absent, and the surrounding skin isn’t particularly swollen or red. Fungal infections develop slowly over weeks or months, while an ingrown toenail typically causes sharp, localized pain that comes on over days.
Paronychia, an infection of the skin next to the nail, looks more similar to an ingrown toenail because it also causes redness, swelling, and pus along the nail border. The key distinction is the cause. Paronychia is triggered by bacteria entering through damaged skin (from picking at your nails, a hangnail, or a cut), while an ingrown toenail is specifically caused by the nail edge pressing into or piercing the skin fold. In practice, an ingrown toenail can lead to paronychia once the broken skin gets infected, so the two sometimes overlap.
Injuries to the toenail and conditions like psoriasis can also produce a painful, discolored nail. If you recently stubbed or dropped something on your toe, that’s a more likely explanation. Psoriasis tends to affect multiple nails and causes pitting or ridging on the nail surface.
Why It Happens
The most widely accepted explanation is straightforward: the edge of the nail plate grows into the soft skin fold running alongside it, triggering pain and inflammation. But there’s a second factor that often gets overlooked. Some people have naturally wide, fleshy skin around their nails, and that excess tissue bulges up against the nail edge, creating pressure even when the nail itself is growing normally. In those cases, it’s the skin pushing into the nail rather than the nail digging into the skin.
Common triggers include cutting your nails too short or rounding the corners (which encourages the skin to grow over the edge), wearing shoes that squeeze your toes, sustaining an injury to the toe, and having naturally curved nails. Sweaty feet can soften the skin and make it easier for the nail to penetrate.
What Treatment Looks Like
Mild, early-stage ingrown toenails often respond to home care. Soaking your foot in warm water for 15 to 20 minutes a few times a day softens the skin and reduces swelling. After soaking, you can gently push the swollen skin away from the nail edge with a clean finger or a cotton swab. Wearing open-toed shoes or roomier footwear takes pressure off the area while it heals.
If home care doesn’t improve things within a few days, or if there’s pus, spreading redness, or significant pain, a healthcare provider has several options depending on severity. These range from lifting the nail edge and placing a small splint or piece of cotton underneath to keep it from digging back in, to partially removing the strip of nail that’s causing the problem. For nails that keep coming back, the root of the nail along that edge can be treated so it doesn’t regrow. These procedures are done under local anesthesia and are typically quick, with most people walking the same day.
People with diabetes, nerve damage, or circulation problems in their feet should skip the home remedies and go straight to a professional. Reduced blood flow slows healing, and reduced sensation means you may not feel how severe the problem has become.