What Is an Ingrown Toenail?

An ingrown toenail occurs when the edge of a toenail — most commonly the big toe — grows into the surrounding skin rather than over it. The result is localized pain, swelling, redness, and sometimes infection. While it may seem like a minor nuisance, an untreated ingrown toenail can lead to a serious infection, particularly for people with diabetes or circulation problems.

Why Do Ingrown Toenails Happen?

Several factors contribute to ingrown toenails:

  • Improper trimming: Cutting nails too short or rounding the corners encourages the nail edges to grow into the skin.
  • Tight footwear: Shoes that compress the toes force the nail into surrounding tissue.
  • Nail shape: Naturally curved or fan-shaped toenails are more prone to growing inward.
  • Injury: Stubbing your toe or having something dropped on your foot can cause the nail to grow abnormally.
  • Heredity: Nail shape and thickness are often inherited traits.

Recognizing an Ingrown Toenail

Symptoms typically follow a predictable progression:

  1. Early stage: Tenderness and slight swelling along one or both sides of the nail.
  2. Moderate stage: Increased pain, redness, and fluid build-up around the nail.
  3. Infected stage: Pus, severe pain, warm skin, and possibly a foul odor — this stage requires medical attention.

Safe Home Treatment (Early to Moderate Cases)

For mild ingrown toenails without signs of infection, the following steps can help:

  1. Soak the foot: Soak in warm (not hot) water with a small amount of Epsom salt for 15–20 minutes, 3–4 times per day. This softens the nail and reduces inflammation.
  2. Lift the nail edge: After soaking, gently place a small piece of clean cotton or dental floss under the ingrown edge to encourage the nail to grow above the skin. Change this daily.
  3. Keep it clean and dry: Apply an antiseptic, cover with a clean bandage, and change it regularly.
  4. Wear open-toed shoes or roomy footwear: Minimize pressure on the affected toe while it heals.
  5. Use OTC pain relief: Ibuprofen or acetaminophen can help manage discomfort.

Important: Do not attempt to dig out or cut the ingrown portion yourself, especially with non-sterile tools. This increases infection risk significantly.

When to See a Podiatrist

Seek professional care if you notice any of the following:

  • Pus or discharge from the nail area
  • Rapidly spreading redness or warmth
  • Fever alongside nail symptoms
  • You have diabetes, peripheral arterial disease, or nerve damage in your feet
  • The ingrown nail keeps returning despite home treatment

A podiatrist can perform a minor in-office procedure — called a partial nail avulsion — to remove the ingrown portion under local anesthetic. For recurring cases, a chemical treatment (phenolization) can permanently prevent that portion of the nail from growing back.

Prevention: The Best Long-Term Strategy

With the right habits, most ingrown toenails are entirely preventable:

  • Trim toenails straight across — never round the corners or cut too short
  • Keep nails at a moderate length (roughly even with the tip of the toe)
  • Wear properly fitting shoes with adequate toe-box width
  • Use clean, proper-sized nail clippers rather than scissors or improvised tools
  • Wear protective footwear in environments where foot injuries are likely

Good toenail hygiene doesn't take long, but it can save you from considerable pain and expense down the road.