Few things are quite as deceptively painful as an ingrown toenail. What starts as a mild ache along the edge of a toe can quickly escalate into something that makes pulling on shoes feel daunting, walking uncomfortable, and sleeping with pressure on the foot almost unbearable. Yet despite how common the condition is, most people are not entirely sure what causes it or how to stop it from happening again.
An ingrown toenail occurs when the edge or corner of the nail grows into the surrounding skin rather than over it. The big toe is most frequently affected, though any toe can develop the condition. Once the nail pierces the skin, the body responds with inflammation, making the area red, swollen and tender. If bacteria enter through that break in the skin, infection follows, and at that point the condition moves beyond something a warm salt soak will fix.
What actually causes ingrown toenails
Understanding the root causes is the first step toward preventing them.
- How you trim your nails
The most common cause of ingrown toenails is incorrect nail trimming. When toenails are cut too short or rounded at the corners to mimic the shape of a fingernail, the skin at the sides of the toe folds over the nail. As the nail grows forward, it drives into that folded skin rather than clearing it. Cutting straight across, leaving the nail long enough to see a sliver of white at each corner, is the technique that prevents this from happening.
- Footwear that crowds the toes
Shoes that are too narrow, too short or press down on the toes create consistent pressure along the nail edges. Over time, that pressure redirects nail growth inward. This is a particularly common issue with pointed-toe styles, court shoes worn for long hours and trainers that are a half-size too small. The connection between tight shoes and ingrown nails is well established, and footwear choice is one of the most actionable preventive factors.
- Nail shape and genetics
Some people are simply born with nails that curve more than average, a shape sometimes called a pincer nail or involuted nail. This natural curvature means the edges are more likely to dig into the skin even with a perfect trimming technique. If you have recurring ingrown toenails despite doing everything right, this may be a contributing factor worth discussing with a podiatrist.
- Trauma to the toe
Stubbing a toe, having something heavy dropped on it, or repeated microtrauma from sport can disrupt the way the nail grows from the root. Runners and footballers are particularly prone to this, as the repetitive forward pressure of the foot inside the shoe during activity adds up over time.
- Fungal nail infections
A nail affected by fungal infection thickens, becomes brittle and often develops a curved or distorted shape. That structural change increases the likelihood that the nail edge will dig into the surrounding skin. Treating a fungal infection is therefore not just a cosmetic concern; it can directly reduce the risk of ingrown nails.
- Tight hosiery and socks
Even if the shoe itself fits well, very tight socks or stockings that compress the toes can apply enough sustained pressure to alter nail growth over time. This is a less commonly discussed cause, but it is relevant for people who wear compression hosiery regularly.
How to prevent ingrown toenails
Prevention requires consistent habits rather than a single fix, but none of them is complicated.
1. Trim your toenails straight across, cutting them at roughly the level of the toe tip. Do not taper the corners and do not cut down the sides. Use proper nail scissors or clippers designed for toenails rather than fingernail clippers, which tend to produce a curved cut. After a shower or bath, when nails are softer, is the easiest time to trim.
2. Choose footwear with a wide enough toe box that your toes can sit flat without being squeezed together. There should be roughly a thumbnail’s width of space between your longest toe and the front of the shoe. If you are shopping for shoes later in the day when feet are naturally slightly larger, you get a more accurate sense of how they will feel after hours of wear.
3. Keep feet clean and dry, particularly between the toes and around the nail edges. Moisture creates an environment where bacteria and fungi thrive, both of which increase the risk of complications if a nail does begin to grow inward. Ingrown nail treatment becomes more complex when infection is involved, so keeping the area clean is a simple preventive step with meaningful results.
4. Check your toenails regularly, particularly if you are active or wear tight footwear for work. Early signs of an ingrown nail, such as mild tenderness or slight redness along one edge, are far easier to manage than a fully embedded nail with infection.
5. If you have diabetes or circulatory issues, routine professional nail care is especially important. Reduced sensation can mean an ingrown nail is not noticed until it has already become infected, and reduced blood flow can slow healing. A podiatrist can safely trim nails and identify problems early, before they escalate.
When home care is not enough
A mild ingrown toenail, caught very early, can sometimes be managed at home with salt soaks, proper trimming technique, and footwear changes. But there are clear signals that professional care is needed. If the toe is red and warm to the touch, if there is discharge or pus, if the pain is worsening rather than improving, or if the nail has not improved after a week of home care, it is time to see a podiatrist.
Attempting to dig out the ingrown portion with scissors or a sharp instrument at home is one of the most common ways people make the situation significantly worse. It pushes the nail deeper, damages the surrounding skin and introduces bacteria into an already vulnerable area.
A podiatrist can lift or remove the offending nail edge under local anaesthetic with minimal discomfort. For recurrent cases, a procedure with phenol permanently prevents regrowth in the problematic area, providing a long-term solution rather than a temporary fix.
Stop managing it and start resolving it
An ingrown toenail that keeps coming back is not bad luck; it is a sign that the underlying cause has not been addressed. Whether that is nail shape, trimming habits, footwear or a structural issue, a proper assessment makes the path forward clear.
The team at Feet First Podiatry Clinic treats ingrown toenails at every stage, from early intervention to surgical removal for stubborn or recurrent cases. Do not keep putting up with the pain or the anxiety of wondering when it will flare up again. Book an appointment and get a clear assessment, a comfortable treatment and the practical guidance to keep it from coming back.