Preventing ingrown toenails comes down to how you cut your nails, what shoes you wear, and how you manage a few key risk factors. Ingrown toenails affect roughly 2.5 to 5% of the population, and they’re especially common in adolescents, pregnant women, and men. The good news is that most cases are entirely preventable with a few consistent habits.
Why Toenails Become Ingrown
An ingrown toenail develops when the edge of the nail plate curves or grows into the soft skin of the nail fold, triggering pain, swelling, and sometimes infection. The big toe is the most frequent target. The underlying cause is usually mechanical: something pushes the nail into the skin, or the skin swells up around the nail edge.
The most common triggers are cutting nails too short or rounding the corners, wearing shoes that squeeze the toes, and sustaining minor trauma (stubbing your toe, dropping something on it, or repetitive pressure from running). Some people are also structurally predisposed. A naturally narrow nail bed, increased curvature of the nail plate (sometimes called a pincer nail), or malalignment of the big toenail can all make ingrown nails a recurring problem regardless of how carefully you trim. These traits can be inherited, and congenital forms have been documented even in infants.
How to Trim Your Toenails Correctly
Nail trimming technique is the single most controllable prevention factor, and the rule is simple: cut straight across. Do not round the corners or follow the curve of your toe. When you taper the edges, the nail is more likely to dig into the surrounding skin as it grows forward. The American Academy of Dermatology recommends using a dedicated toenail clipper rather than fingernail clippers or scissors, since toenail clippers are wider and designed for the thicker nail plate.
Leave enough length that the white tip of the nail is still visible and roughly even with the tip of your toe. Cutting too short is one of the most common mistakes, because a very short nail gives the surrounding skin room to fold over the edge, trapping the nail as it regrows. After clipping, use an emery board to smooth any sharp edges that could catch on the skin. If your nails are thick or hard to cut, soaking your feet in warm water for 10 to 15 minutes beforehand softens them and makes a clean cut easier.
Choosing the Right Footwear
Shoes that compress your toes push the skin into the nail edge with every step. Over hours of walking, that repeated pressure is enough to start an ingrown nail. The key feature to look for is a spacious toe box, the front section of the shoe where your toes sit. You should be able to wiggle all five toes freely. Pointed-toe shoes, narrow dress shoes, and high heels are the worst offenders because they funnel pressure directly onto the big toe.
When buying shoes, shop later in the day when your feet are slightly swollen from activity. There should be about a thumb’s width of space between your longest toe and the front of the shoe. This is especially important for athletic shoes, since your feet slide forward during movement. Socks matter too: very tight socks or hosiery can create the same compressive effect as a narrow shoe.
Extra Precautions for Runners and Athletes
Runners are particularly prone to ingrown toenails because of repetitive downhill impact, moisture buildup, and shoes that may fit fine while standing but become too tight during a run. If the front of your foot hits the front of the shoe during a stride, you’re at risk for both ingrown and black toenails. Make sure your running shoes have that thumb’s width of clearance at the toe.
Overpronation, where your foot rolls inward excessively during each step, is a commonly overlooked contributor. It places extra pressure on the inside edge of the big toe, right where ingrown nails typically develop. Supportive insoles or motion-control shoes can help correct this. Keeping your feet dry also matters: moisture softens the skin around the nail, making it easier for the nail edge to penetrate. Moisture-wicking socks and rotating between pairs of shoes so each pair dries fully between uses both help.
What to Do at the First Sign of Trouble
An ingrown toenail usually starts with tenderness and mild redness along one side of the nail. At this stage, you can often resolve it at home. Soak the foot in warm water for 15 to 20 minutes a few times a day to reduce swelling and soften the tissue. Gently lift the nail edge away from the skin if possible, and place a tiny piece of clean cotton or dental floss underneath to encourage the nail to grow over the skin rather than into it. Apply an over-the-counter antibiotic ointment and keep the area clean.
If your symptoms haven’t improved within a few days, or you notice pus, liquid drainage, extreme pain, or spreading redness, those are signs of infection that need professional attention. The same goes for recurrent ingrown nails that keep coming back despite good trimming and footwear habits.
When Anatomy Works Against You
For people whose nail shape or foot structure makes ingrown nails a chronic issue, trimming and shoe selection may not be enough on their own. Podiatrists can apply nail braces, small devices bonded to the surface of the nail that gently flatten its curvature over time. These braces are typically adjusted every two to four weeks and work well for nails with excessive curvature that repeatedly dig into the skin. The procedure is painless and doesn’t require any cutting.
For severe or repeatedly infected ingrown nails, a partial nail removal can permanently narrow the nail plate so the problematic edge doesn’t grow back. This is a minor in-office procedure with a relatively quick recovery, and it has a high success rate for ending the cycle of recurrence.
Special Risks for People With Diabetes
Diabetes makes ingrown toenails significantly more dangerous. Nerve damage from diabetes can dull sensation in your feet, meaning you might not feel an ingrown nail until it’s already infected. At the same time, diabetes narrows and hardens blood vessels, reducing circulation to the feet. Poor blood flow slows healing and makes it harder for your body to fight infection. What starts as a minor ingrown nail can progress to a serious wound, and in severe cases, this chain of events contributes to limb loss.
If you have diabetes, check your feet daily for redness, swelling, or changes around the nails. Trim toenails straight across and file down sharp edges with an emery board. Keep nails from getting too long, since thick or overgrown nails can press into neighboring toes and create open sores. Any sign of an ingrown nail, even a mild one, warrants a prompt call to your care team rather than home treatment.