An ingrown toenail happens when the edge of your nail grows into the soft skin alongside it, triggering pain, swelling, and sometimes infection. It most commonly affects the big toe and ranges from a mild annoyance you can treat at home to a chronic problem that needs a minor procedure to fix. Understanding what stage you’re dealing with helps you choose the right response.
How an Ingrown Toenail Develops
Your toenail normally grows forward over the nail bed, with the skin on either side sitting just beside the nail’s edge. An ingrown toenail forms when that edge curves downward or gets pushed into the fold of skin next to it. Once the nail pierces the skin, your body treats it like a foreign object, launching an inflammatory response that causes redness, swelling, and pain.
Several forces can push the nail into the skin. Cutting your nails too short or rounding the corners is the most common trigger, because the skin at the sides can fold over the shortened nail edge as it regrows. Tight shoes and socks create constant pressure that drives the nail sideways. Athletic activity and excess body weight increase the ground-reaction forces pushing up through the toe with every step, which accelerates the nail’s penetration into the surrounding tissue.
Genetics also play a role. The natural curvature of your nail bed is inherited, so if your parents or grandparents dealt with chronic ingrown nails, you may have a nail shape that makes you more prone to the condition regardless of how carefully you trim.
The Three Stages
Doctors classify ingrown toenails into three stages based on how far the problem has progressed:
- Stage 1: The nail has grown into the skin on one side. The area is painful and inflamed but not infected.
- Stage 2: New inflamed tissue called a granuloma has formed at the nail’s edge. The area weeps fluid and produces pus.
- Stage 3: The skin is chronically inflamed and continues oozing pus. The granuloma tissue has started growing over the top of the nail itself.
Stage 1 ingrown toenails typically respond well to home care. Stages 2 and 3 often need professional treatment, and stage 3 almost always requires a minor surgical procedure.
What It Feels Like
The first sign is usually tenderness along one side of the toenail, especially when you press on it or wear shoes. As the nail digs deeper, the pain becomes constant rather than pressure-dependent. The skin next to the nail turns red and puffy, and the toe may feel warm to the touch.
If infection sets in, the pain intensifies and you’ll notice yellowish or greenish drainage. The swollen tissue beside the nail can develop a small, bead-like bump of raw, reddish tissue (granuloma) that bleeds easily when bumped. At this point, even a bedsheet resting on the toe can be uncomfortable.
Treating It at Home
For a stage 1 ingrown toenail, conservative care at home is usually enough. The goal is to soften the skin, reduce swelling, and coax the nail edge away from the tissue it’s digging into.
Soak your foot in warm water with about one tablespoon of Epsom salt per liter, two to three times a day for 15 to 20 minutes each session. This softens both the nail and the surrounding skin, eases pain, and reduces swelling. After soaking, gently push the softened skin away from the nail edge using a clean cotton swab or popsicle stick. Then tuck a small wisp of clean cotton or a short piece of dental floss under the corner of the nail to keep it lifted above the skin fold. Replace this cotton daily after each soak.
Between soaks, keep the toe clean and dry. Wear open-toed shoes or roomy footwear that doesn’t press on the affected side. Most stage 1 ingrown nails improve noticeably within a week or two of consistent care. If you see pus, spreading redness, or worsening pain despite several days of home treatment, it’s time for professional help.
When a Procedure Is Needed
When conservative treatment fails, when the nail is deformed, or when you’re dealing with a stage 2 or 3 ingrown toenail, a surgical approach is typically recommended. The most common procedure is partial nail avulsion, where a podiatrist or doctor numbs the toe with a local anesthetic and removes the strip of nail that’s embedded in the skin. The whole process usually takes under 30 minutes, and you walk out on your own foot.
To prevent the same sliver of nail from growing back and causing the problem again, many practitioners follow the removal with chemical matrixectomy. This involves applying a chemical (typically phenol) to the exposed nail matrix, the tissue responsible for nail growth, to permanently stop that narrow section from regrowing. A large meta-analysis of clinical trials found that combining nail avulsion with phenol matrixectomy dramatically reduces the chance of recurrence compared to avulsion alone. Recovery from the procedure generally takes a few weeks, during which you’ll keep the toe bandaged and clean.
Total nail removal is reserved for severe or repeatedly recurring cases. For most people, removing just the offending strip of nail is enough.
Why Diabetes Changes the Picture
People with diabetes face unique risks from ingrown toenails. Diabetic neuropathy, the gradual loss of sensation in the feet, can mask the early pain signals that would normally prompt someone to act. By the time the problem is noticed, the nail may have already caused significant tissue damage or infection.
Peripheral vascular disease, another common complication of diabetes, reduces blood flow to the feet. Poor circulation thickens the nails and disrupts their structure, making them more likely to grow abnormally. It also slows healing and makes the feet more vulnerable to bacterial and fungal infections. For anyone with diabetes, even a mild ingrown toenail warrants professional evaluation rather than home treatment, because a simple nail problem can escalate into a serious foot infection surprisingly quickly.
Preventing Ingrown Toenails
The single most important prevention step is cutting your toenails correctly. Trim them straight across, leaving them long enough that the corners rest loosely against the skin at the sides. Don’t round the edges, don’t cut them into a V-shape, and don’t trim them so short that the skin can fold over the nail as it grows out. Use a proper toenail clipper rather than scissors, and if your nails are thick or hard to manage, soften them with a warm soak first.
Footwear matters nearly as much as trimming technique. Shoes that squeeze the toes together push the skin into the nail edge with every step. Choose shoes with a roomy toe box, and avoid wearing tight socks or stockings for prolonged periods. If you’re an athlete or on your feet all day, this is especially important because the repetitive forces through the toe amplify any pressure from poorly fitting shoes.
If you have naturally curved nails and get ingrown toenails repeatedly despite good trimming habits, a one-time partial matrixectomy on the problematic edge can permanently narrow the nail just enough to stop it from reaching the skin fold. It’s a minor trade-off in nail width for a lasting solution.
Signs of a Serious Complication
Most ingrown toenails resolve with basic care or a simple office procedure, but infection can occasionally spread beyond the toe. Watch for redness that extends past the immediate area of the nail, red streaks moving up the foot, fever, or increasing pain that doesn’t respond to soaking and over-the-counter pain relief. These suggest the infection has moved into deeper tissue. In rare cases, particularly in people with diabetes or compromised immune systems, untreated infection can reach the underlying bone, a condition called osteomyelitis, which causes deep bone pain, warmth over the area, fatigue, and fever. This requires prompt medical treatment to prevent lasting damage.