Ingrown nails happen when the edge or corner of a nail grows into the surrounding skin, causing pain, redness, and sometimes infection. The big toe is the most common site, though any toenail can be affected. The good news: most ingrown nails are preventable with the right trimming technique, proper footwear, and a few simple habits.
Cut Straight Across, Not Rounded
The single most effective thing you can do is change how you trim your toenails. Cut them straight across so the corners remain visible. When you round the edges or taper the sides, you create a nail shape that’s more likely to curve downward and dig into the skin as it grows out. A straight cut encourages the nail to grow forward over the skin rather than into it.
Keep the length even with the tip of your toe. Cutting too short removes the nail’s natural structure and lets the skin at the edges fold over the nail bed, trapping the nail as it regrows. If you can see a sliver of white at the free edge, you’re in the right range. Resist the urge to dig into the sides of the nail with your clippers or a file. That kind of digging causes small wounds in the skin fold, and the nail will grow directly into that damaged tissue.
Use a straight-edge toenail clipper rather than the curved type most people keep in a bathroom drawer. Straight-edge clippers make it easier to cut a clean, flat line and harder to accidentally round the corners. Curved clippers also increase the risk of nicking the skin, especially if you press too hard or cut close to the edge. If you have thick nails, soften them first by trimming after a bath or shower.
Wear Shoes That Give Your Toes Room
Tight-fitting shoes are one of the most common causes of ingrown toenails. When shoes squeeze your toes together, they push the skin against the nail edges for hours at a time. That constant lateral pressure can force even a properly trimmed nail into the surrounding skin.
The key measurement is the width of the toe box, the front portion of the shoe where your toes sit. Your feet should be measured every time you buy shoes, because foot shape and size change over time. Measure at the end of the day, when your feet are at their largest from normal swelling. Most people have one foot slightly bigger than the other, so always fit shoes to the larger foot. You should be able to wiggle all five toes freely when standing. If the shoe pinches your big toe or little toe against its neighbor, it’s too narrow.
High heels and pointed-toe shoes are particularly problematic because they funnel your body weight forward into a narrow space. If your work or lifestyle requires these styles, limit the hours you spend in them and switch to wider shoes when possible.
Socks, Moisture, and Friction
Damp, sweaty feet soften the skin around your nails and make it easier for nail edges to push through. Moisture-wicking socks made from synthetic blends or merino wool pull sweat away from the skin and reduce friction between your toes and shoes. Cotton socks absorb moisture but hold it against your skin, which is the opposite of what you want.
If you’re an athlete or spend long hours on your feet, this matters even more. Repetitive impact from running, hiking, or court sports drives the toes forward into the front of the shoe with every step. Pairing properly fitted athletic shoes with moisture-wicking socks reduces both the pressure and the damp conditions that set up ingrown nails.
Who Gets Ingrown Nails Most Often
Some people are more prone to ingrown nails regardless of how carefully they trim. Heredity plays a role: if your nails are naturally curved or fan-shaped, the edges sit closer to the skin and are more likely to embed. Ingrown nails are especially common in schoolchildren, adolescents, young adults, and pregnant women. During pregnancy, foot swelling can turn previously comfortable shoes into a compression problem almost overnight.
Trauma to the nail also raises your risk. Stubbing your toe, dropping something on it, or repeated micro-trauma from sports can damage the nail matrix and cause irregular growth patterns. If you’ve injured a toenail, pay extra attention to how it grows back in, trimming carefully and keeping the corners visible.
Trimming Children’s Nails Safely
Children get ingrown nails too, and the prevention rules are the same: cut straight across so the corners are visible. Use a nail clipper rather than scissors, which are harder to control on small, squirmy toes. For infants and toddlers, trim nails after a bath when they’re softer, and avoid rounding the corners even if a curved shape looks neater. As children grow, their shoe size changes rapidly. Check the fit of their shoes every few months, because outgrown shoes are a top contributor to pediatric ingrown nails.
Recognizing Early Warning Signs
Ingrown nails progress through three stages, and catching the problem early makes a significant difference. In the first stage, you’ll notice mild redness, slight swelling, and tenderness when pressure is applied to the side of the nail. At this point, soaking the foot in warm water and gently guiding the skin away from the nail edge is often enough to redirect growth.
In the second stage, the redness and swelling become more pronounced, and you may see signs of local infection: increased pain, warmth, and discharge. By the third stage, the body starts building granulation tissue (a bumpy, raw-looking tissue) over or alongside the nail, and the skin fold becomes noticeably thickened. Stages two and three typically need professional care.
What Happens if Prevention Isn’t Enough
If an ingrown nail keeps coming back despite good trimming and shoe habits, a podiatrist can remove the portion of nail that’s embedding into the skin. The toe is numbed first, and the ingrown section is trimmed away. For nails that recur repeatedly on the same toe, a more permanent option involves removing part of the nail along with the underlying nail bed tissue so that strip of nail doesn’t grow back. Both procedures are done in the office and allow you to walk the same day, though soreness and some swelling are normal for a week or two afterward.
Recurrent ingrown nails are worth addressing rather than tolerating. Repeated infections in the nail fold can cause chronic thickening of the skin, making each new episode worse than the last.