Key takeaways
- Cut nails straight across and never round the corners.
- Nails should not extend past the tip of the toe.
- Narrow toe boxes press the nail edge into the skin.
- Pus or spreading redness means see a doctor rather than treating it at home.
An ingrown toenail happens when the edge or corner of the nail grows into the surrounding skin, producing pain, swelling, and sometimes infection. The big toe is the usual site, and any toe can be affected. Severity ranges from mild irritation to pain that makes wearing shoes difficult.
Four things cause them
- How you trim. Cutting nails too short or rounding the corners lets the skin grow over the nail edge, which is the most common cause by some distance.
- Tight shoes. Narrow toe boxes press the skin against the nail edge and hold it there all day.
- Foot structure. Flat feet and high arches change toe alignment in ways that raise the risk.
- Injury. Trauma or repeated stress to the toe alters how the nail grows back.
Four symptoms to catch early
- Pain, usually the first sign, and worst when pressure is applied to the toe.
- Redness and swelling around the nail, with the skin tender to touch.
- Drainage. Pus or fluid indicates infection.
- Thickened skin around the nail, as the body builds up tissue to protect the area.
Trim straight across
Cut the nail straight across and leave the corners square. Rounding them, the way most people trim fingernails, is what encourages the edge into the skin. Keep the length so the nail does not extend past the tip of the toe, because longer nails catch against the shoe and take the pressure that pushes the edge inward.
Keep the toe clean and dry
Wash and dry your feet regularly, paying attention between the toes, since trapped moisture raises infection risk. Soaking in warm water with Epsom salt softens the skin and reduces irritation when a nail is starting to become a problem. Over-the-counter pain relief and a topical antiseptic manage a mild case at home.
Shoes with room at the front
A wide toe box takes pressure off the toes and is the most useful change most people make. Add support and cushioning with proper shock absorption and arch support, and consider orthotic inserts where uneven pressure distribution is part of the cause.
When to stop treating it yourself
- Signs of infection, meaning increasing redness, swelling, or pus, which need medical treatment.
- Pain that persists through home care.
- Recurrence, where ingrown nails keep returning despite correct trimming and roomy shoes. A podiatrist can assess the nail shape and offer a permanent solution.
Anyone with diabetes or reduced circulation in the feet should see a professional for an ingrown nail rather than treating it at home, since the infection risk is materially higher.
