How to Trim Toenails Properly to Prevent Ingrown Nails: A Podiatrist Guide

Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Hills, MI. Last updated April 2026.

Why Nail Trimming Technique Matters

Ingrown toenails are one of the most common — and most preventable — foot conditions treated in podiatric practice. The primary cause in most patients is not heredity or footwear alone but improper nail trimming technique: cutting the nail too short, rounding the corners, or tearing the nail rather than cutting it cleanly. Understanding the correct technique and following it consistently prevents most ingrown nail episodes entirely.

The Correct Way to Trim Toenails

Cut Straight Across

The most important rule of toenail trimming is to cut straight across — horizontal to the toe — rather than curving the cut to follow the contour of the toe tip. Curved cutting rounds the nail corners, creating shorter nail edges at the sides that can grow down into the soft tissue of the nail fold as the nail extends. Cutting straight across keeps the nail edges at the same level as the skin surface, preventing the nail edge from piercing the nail fold tissue.

Leave the Nail at the Correct Length

The nail should extend just to the end of the toe — even with or fractionally beyond the skin edge. Cutting the nail too short — where the nail no longer covers the nail bed and the skin rises above the nail edge — is a direct cause of ingrown nail. The exposed skin at the nail edge then overlaps the nail as it grows forward, trapping the growing nail edge and driving it into the skin. A small amount of visible white nail at the free edge is the target length.

Do Not Round or File the Corners Downward

Filing the nail corners downward into the nail fold — a common but misguided attempt to remove an early ingrown nail — worsens the problem by creating a sharp nail spicule that grows into the soft tissue as the nail advances. If the nail corner appears to be digging in, do not file it sharply — gently smooth any rough edges straight across but do not thin or round the corner downward.

Choosing the Right Tools

Use dedicated toenail clippers — not fingernail clippers, which are too small and create cracking rather than clean cuts in thicker toenails. Toenail clippers have a wider, flatter jaw appropriate for the broader nail plate of the toes. Ensure the clippers are sharp — dull clippers crush and crack the nail rather than cutting cleanly, leaving rough edges that encourage ingrown nail formation. Replace nail clippers every one to two years for optimal cutting performance.

Trim nails after bathing or soaking when they are softest — this reduces the force required for cutting and prevents nail cracking. Never tear nails — manual tearing creates irregular nail edges that grow in unpredictably.

How Often to Trim Toenails

Toenails grow approximately one to two millimeters per month — significantly slower than fingernails. Trimming toenails every four to six weeks is sufficient for most patients. Athletes who wear tight footwear, patients with rapid nail growth, and anyone who has experienced recurrent ingrown nails may need to trim more frequently. Diabetic patients and those with neuropathy should have their nails trimmed by a podiatrist if nail care is difficult or risky to perform independently.

Special Considerations for Thick or Fungal Nails

Thickened toenails from fungal infection (onychomycosis) or trauma are difficult to trim with standard nail clippers and may require podiatric nail care. Attempting to trim very thick nails at home often leads to nail cracking, splintering, and injury to the nail fold. Podiatric nail debridement uses specialized instruments to safely reduce thick nails to a comfortable, correctly shaped profile. If your nails are consistently too thick or hard to manage safely at home, schedule professional nail care.

When Ingrown Nails Require Professional Treatment

Early ingrown nails — before infection develops — can sometimes be managed at home with proper trimming correction and warm soaks. However, once infection develops — with drainage, significant redness, or increasing pain — professional treatment is required. A podiatrist can remove the ingrown nail edge under local anesthesia in a brief office procedure that provides immediate relief. For patients with recurrent ingrown nails, permanent nail matrixectomy prevents recurrence by destroying the nail matrix at the corner, preventing that portion of the nail from growing back. Contact Balance Foot & Ankle for ingrown nail evaluation and treatment.

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Professional Toenail Care at Balance Foot & Ankle

Proper toenail trimming prevents painful ingrown nails, infections, and other complications. Dr. Tom Biernacki at Balance Foot & Ankle provides routine nail care and ingrown toenail treatment at our Howell and Bloomfield Hills offices.

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Clinical References

1. Heidelbaugh JJ, Lee H. “Management of the ingrown toenail.” American Family Physician. 2009;79(4):303-308.
2. Haneke E. “Controversies in the treatment of ingrown nails.” Dermatology Research and Practice. 2012;2012:783924.
3. Baran R, Dawber RP. “Physical signs in nail disorders.” Diseases of the Nails and their Management. 2001;3rd ed:35-68.