Cutting toenails well comes down to a few simple principles: cut straight across, don’t go too short, and use the right tools. Most ingrown toenails and nail problems stem from ignoring one of these basics. Here’s exactly how to do it right every time.
Start With the Right Tools
Standard fingernail clippers are too small and curved for toenails. You want large, straight-edge toenail clippers or a pair of toenail nippers with a wide jaw. Nippers give you more control, especially on thicker nails, because they let you take small bites across the nail rather than forcing through in one squeeze. A glass or metal nail file rounds out your kit for smoothing edges afterward.
Keep your tools clean. Professional standards call for washing clippers with soap and water, drying them, then soaking them in 70% isopropyl alcohol for 10 minutes. This matters most if multiple people share tools, but it’s a good habit regardless. Dirty clippers can introduce bacteria into tiny nicks you don’t even notice.
Soften Your Nails First
Dry toenails are brittle. When you clip them dry, they’re more likely to crack, splinter, or split down into the nail bed. Soaking your feet in warm water for 5 to 10 minutes softens the nail just enough to get a clean cut. Right after a bath or shower works perfectly too.
This step is especially important if your nails are thick, yellowed, or hard to cut. Thickened nails from aging or fungal infections can be nearly impossible to clip cleanly without softening first. If your nails are extremely thick, you can gently file the top surface down after soaking to reduce the bulk before cutting.
Cut Straight Across, Not Curved
This is the single most important technique. Cut the nail in a straight line across the top, following the natural width of your toe. Don’t round the corners down into the sides of the nail. The two biggest causes of ingrown toenails are cutting the sides into a curve and cutting too short. When you scoop the edges down, the nail has nowhere to go as it grows back except into the surrounding skin.
If you can’t get a clean straight cut in one pass, take two or three smaller cuts across the nail. Start from one side, work to the middle, then finish the other side. Small bites give you much more precision than trying to clamp across the full width at once, and they put less stress on the nail.
Leave a thin white strip of free nail at the tip. You should not be able to see skin at the top edge of the nail. Cutting flush with the fingertip, or worse, below it, sets you up for pain as the nail grows back and presses into the skin of the nail bed or the sides of the toe.
Smooth the Edges
After cutting, run a nail file across the top edge in one direction (not back and forth like a saw). This removes any micro-jaggedness left by the clippers that could snag on socks or catch on the skin beside the nail. Pay particular attention to the corners. You’re not rounding them down into the sides; you’re just knocking off the sharp points so they don’t dig into the neighboring toe or the nail fold.
Filing in one direction prevents the layered structure of the nail from fraying. Think of it like cutting fabric: sawing back and forth makes the edge ragged, while a single clean stroke keeps it neat.
How Often to Trim
Toenails grow roughly 1.5 millimeters per month, much slower than fingernails. For most people, trimming every 6 to 8 weeks keeps them at a good length. You’ll know it’s time when the nails start pressing against the front of your shoes or catching on your socks. If you exercise heavily or wear tight shoes, check them more often since pressure from footwear on overgrown nails can cause bruising under the nail.
Thick or Difficult Nails
Nails thicken with age, repeated trauma (from running or ill-fitting shoes), and fungal infections. If your nails have become so thick that standard clippers can’t get through them, switch to heavy-duty nippers designed for podiatric use. These have a longer handle for more leverage and a sharper, more robust cutting edge.
Always soak thick nails before cutting. After soaking, dry the foot and make several small cuts rather than trying to power through the full nail at once. Forcing a thick nail through a clipper in one pass can crack the nail vertically down toward the base, which is painful and slow to heal. If your nails are severely thickened, crumbling, or discolored, a podiatrist can thin them with a professional rotary tool and check for underlying fungal infection.
Special Considerations for Diabetes
Diabetes reduces blood flow to the feet and can dull sensation, meaning you might not feel a nick or cut from clipping. The CDC recommends trimming toenails straight across and smoothing sharp edges with a file. Check your feet daily for cuts, redness, swelling, sores, or blisters, since small injuries can escalate quickly when circulation is compromised. Don’t try to remove corns or calluses yourself, and have your feet examined at every healthcare visit.
If you have neuropathy or can’t see your feet well enough to trim carefully, having a podiatrist handle your nail care is a practical and common choice. Many people with diabetes see a foot specialist regularly for exactly this reason.
Common Mistakes to Avoid
- Tearing or peeling nails instead of cutting. This pulls the nail unevenly and can tear it below the free edge, exposing the nail bed to infection.
- Cutting nails at an angle. Angled cuts leave one side shorter than the other, creating a spike that grows into the skin.
- Using dull clippers. Dull blades crush and split the nail rather than cutting cleanly. If your clippers fold or bend the nail before cutting through, replace them.
- Digging into the corners. If you already have a slight ingrown edge, resist the urge to dig it out with clippers or scissors. This almost always makes it worse. Soak the foot, gently lift the nail edge with a small piece of clean cotton, and let it grow out past the skin.
The whole process, from soaking to filing, takes about 15 minutes. Done consistently every month or two with the right technique, it prevents the vast majority of ingrown nails, infections, and discomfort that send people searching for solutions after the fact.