An infected ingrown toenail produces visible changes you can spot at home: redness and warmth spreading beyond the nail edge, swelling that worsens over days, and often pus draining from where the nail digs into the skin. A non-infected ingrown toenail causes pain and mild tenderness, but infection adds a distinct set of symptoms that escalate if left untreated.
Signs of a Non-Infected Ingrown Toenail
Before infection sets in, an ingrown toenail typically causes localized tenderness along one or both sides of the nail. The skin next to the nail may look slightly pink or feel sore when you press on it or wear tight shoes. At this stage, the nail is growing into the surrounding skin fold and causing irritation, but bacteria haven’t taken hold yet.
This is the stage where home care is most effective. Soaking the foot in warm water a few times a day, wearing open-toed or roomy shoes, and gently keeping the skin from pressing against the nail edge can allow the area to heal on its own. If the soreness doesn’t improve within a few days, or if you notice any of the signs below, the situation has likely progressed.
What an Infected Ingrown Toenail Looks Like
Infection changes both how your toe looks and how it feels. The key differences from a simple ingrown nail are:
- Increased redness and warmth. The skin around the nail becomes noticeably red, and the area feels warm or hot to the touch. This redness may spread beyond the immediate nail fold.
- Swelling that gets worse. The tissue next to the nail puffs up more than you’d expect from simple irritation. It may feel tight or throbbing.
- Pus or drainage. Any yellow, white, or green discharge coming from the nail edge is a clear indicator of infection. The drainage often has an unpleasant smell. Pus is thick and milky, not the same as the clear fluid that sometimes weeps from an irritated area.
- Pain that intensifies. The pain shifts from a dull soreness to a sharper, more constant ache. It may throb even when you’re not touching it or wearing shoes.
A white or yellow pus-filled pocket (abscess) can form along the nail fold. If you see this, the infection has progressed enough that it likely won’t resolve with soaking alone.
How Infection Progresses
Most ingrown toenail infections start when bacteria, commonly staph, enter the broken skin where the nail pushes into the surrounding tissue. In the early phase, you’ll notice increasing redness, swelling, and tenderness that doesn’t respond to warm soaks. This is sometimes called paronychia, a term for infection of the skin around the nail.
If left untreated, the infection can deepen. The abscess grows larger, drainage increases, and the surrounding skin becomes more inflamed. At this point, a healthcare provider typically needs to numb the toe, drain the pus, and trim or remove the portion of nail that’s digging into the skin. In some cases, oral antibiotics are prescribed alongside the procedure.
A more serious concern is the infection spreading beyond the toe. This doesn’t happen often, but it moves fast when it does. Lymphangitis, an infection of the lymphatic channels, can travel from the initial wound to other parts of your body in less than 24 hours.
Red Flags That the Infection Is Spreading
Certain symptoms indicate the infection has moved past the toe and into surrounding tissue or your bloodstream. These require prompt medical attention:
- Red streaks on your skin. Lines of redness extending from the toe toward your ankle or up your foot are a hallmark sign of lymphangitis. This means bacteria are traveling through your lymphatic system.
- Fever, chills, or feeling shivery. A high temperature or flu-like symptoms alongside an infected toe suggest the infection is becoming systemic.
- Swollen lymph nodes. You may notice tender swelling in your groin on the same side as the affected foot.
- Worsening redness and swelling spreading across the foot. When the skin around the toe becomes increasingly red, hot, and swollen over hours rather than days, this may indicate cellulitis, a bacterial skin infection that needs antibiotics.
Why Diabetes Changes the Equation
If you have diabetes, an ingrown toenail carries significantly more risk. Diabetes can reduce blood flow to the feet, which slows healing and makes even minor injuries more likely to become infected. Nerve damage (a common complication of diabetes) can also dull sensation in the feet, meaning you might not notice the pain of an ingrown nail until the infection is well established.
The CDC lists an ingrown toenail alongside blisters, ulcers, and infected corns as a foot problem that warrants a doctor visit for people with diabetes. Daily foot checks are recommended to catch problems early, since a small issue that would heal easily in someone with normal circulation can escalate quickly when blood flow is compromised. If you have diabetes and notice any signs of an ingrown toenail, infected or not, professional care is the safer path.
Infected Ingrown Nail vs. Fungal Infection
It’s worth knowing the difference between a bacterial infection from an ingrown nail and a fungal nail infection, since they look quite different. A bacterial infection from an ingrown nail develops over hours to days, with acute pain, redness, swelling, and pus. A fungal infection develops slowly over weeks or months, causing the nail itself to thicken, turn yellow or green, and become dry and brittle. The nail may develop ridges or waves and can eventually detach from the nail bed.
That said, both can occur at the same time. Chronic infections around the nail can involve both bacteria and fungi, particularly a type of yeast called candida. If your nail looks discolored and thickened in addition to the acute redness and swelling of an ingrown nail, both issues may need treatment.
What to Expect From Professional Treatment
For a mildly infected ingrown toenail, a provider may prescribe topical or oral antibiotics and recommend continued warm soaks. For a more advanced infection with significant pus and swelling, the provider will numb the toe with a local anesthetic and remove the section of nail that’s embedded in the skin. This relieves pressure immediately and allows the infection to drain. The procedure is done in the office and recovery typically involves keeping the area clean and dry for a few days.
If the same toenail keeps becoming ingrown, a provider can remove a portion of the nail along with the underlying nail bed tissue to prevent that section from growing back. This is a more permanent solution for people who deal with recurrent ingrown nails on the same toe.