Dental floss can be used to gently lift the corner of an ingrown toenail away from the skin it is digging into, and the technique is one of several recognized conservative treatments for early-stage ingrown toenails. The idea is simple: slide a small piece of waxed dental floss beneath the nail edge that has started to curve into the surrounding skin fold, then secure it so the nail is held slightly elevated while the area heals. It works best when the nail has only recently started pressing into the skin and there is no significant infection or tissue overgrowth. Getting the floss in place without causing more harm takes a bit of patience, the right preparation, and a clear understanding of when to stop and see a doctor instead.
When Dental Floss Is Worth Trying
The dental floss method falls under what clinicians call “threading the nail plate,” which involves lifting the distal part of the nail using dental floss and glued dressings to redirect the nail’s growth away from the skin fold.1Journal of Cosmetic Dermatology. Ingrown Toenail in Children and Conservative Treatment Methods: A Case Report It belongs to a broader family of conservative approaches, which also includes cotton wick elevation, taping, tube splinting, and gutter splints.2National Institutes of Health (PubMed Central). Steri-Strip Sling Technique – A Simple Procedure for the Management of Ingrown Toenails – A Prospective Study All of these share the same logic: physically separate the offending nail edge from the inflamed skin so the tissue can heal and the nail can grow out past the trouble spot.
This approach is realistic only in the earliest stage of an ingrown toenail, when you notice redness, mild tenderness, and slight swelling along one side of the nail. If the skin fold is already producing pus, bleeding on contact, or forming a fleshy bump of granulation tissue over the nail edge, the floss technique is unlikely to help and may make things worse. A good rule of thumb: if you can still see the corner of the nail and gently touch it without severe pain, you are probably in the window where conservative home treatment is reasonable.
What You Need Before Starting
Gather your supplies before you begin so you are not rummaging through drawers with a sore toe propped up awkwardly. You will need:
- Waxed dental floss: Waxed slides more easily under the nail edge than unwaxed. Avoid flavored varieties if possible, since some contain additives that can irritate broken skin. Cut a piece about six inches long.
- Warm water and mild soap: For soaking the foot beforehand to soften the nail and surrounding tissue.
- Antiseptic solution: Chlorhexidine or povidone-iodine for cleaning the area. Hydrogen peroxide is a common household substitute but can slow healing if used repeatedly.
- Small, clean tweezers or a flat-ended nail tool: Something thin enough to help guide the floss under the nail corner.
- A small adhesive bandage or medical tape: To secure the floss in place once positioned.
- Optional topical antibiotic ointment: A thin layer applied after placing the floss can help ward off surface bacteria.
Everything that will touch your toe should be clean. Wipe down your tweezers with rubbing alcohol or the antiseptic solution before starting. Wash your hands thoroughly.
Step-by-Step Technique
Start by soaking your foot in warm (not hot) soapy water for about 15 to 20 minutes. The soak has two purposes: it softens the nail plate so it flexes more easily, and it reduces swelling in the surrounding skin fold, which gives you a bit more room to work with. After soaking, dry the foot gently with a clean towel and apply a small amount of antiseptic around the affected nail edge.
With the foot dry and the nail still pliable, take your length of waxed dental floss and fold it into a small loop or doubled strand. Using your fingers or the tip of a clean pair of tweezers, work one end of the floss gently under the corner of the nail where it is pressing into the skin. You are aiming to slide the floss between the underside of the nail edge and the top of the nail fold. Go slowly. If you meet resistance, try rocking the floss gently side to side rather than pushing straight in. Forcing it will tear the already irritated skin and introduce bacteria deeper into the wound.
Once the floss is positioned under the nail corner, pull it through so that a small section sits like a cushion between the nail edge and the skin. You do not need a big wad of material under there. Just enough to keep the nail slightly lifted so it is no longer digging in. Trim the excess floss on either side, leaving small tails you can tape down against the toe to hold the floss in place. Apply a thin layer of antibiotic ointment over the area, then cover with a small adhesive bandage.
The placement does not need to be deep. You are working only at the very corner of the nail where it meets the skin. If the ingrown edge extends far back along the nail fold, the floss may not reach the root of the problem, and you are better off seeing a podiatrist who has access to specialized tools.
Maintaining and Replacing the Floss
The floss is not a one-and-done fix. You need to keep the nail lifted consistently while it grows out past the point where it was digging in, and that can take anywhere from a couple of weeks to over a month depending on how fast your nails grow and how deeply the nail was embedded. During that time, the floss needs regular replacement.
Change the floss at least once a day, ideally after a fresh soak. Old floss collects bacteria and moisture, and a damp, dirty pad wedged against broken skin is an invitation for infection. Each time you replace it, repeat the same process: soak, clean, gently insert fresh floss, apply ointment, bandage. Check the skin fold for signs that things are getting worse rather than better. Increasing redness that spreads beyond the toe, throbbing pain that wakes you at night, pus, or a fever are all signals to stop home treatment and see a healthcare provider.
Between changes, keep the toe as dry as possible. Moisture-wicking socks and open-toed shoes or sandals help. If you have to wear closed shoes for work, change your socks halfway through the day. Tight, narrow shoes are one of the most common contributors to ingrown toenails in the first place, so switching footwear while you are treating the problem is doing double duty.
How Dental Floss Compares to the Cotton Wedge Method
The cotton wedge (or cotton wick) method is probably the most widely known home technique for ingrown toenails and works on the same principle: a small wisp of cotton is tucked under the nail corner to lift it. Both methods appear in medical literature as forms of tamponade, where material is placed between the nail plate and the periungual fold to relieve pressure.1Journal of Cosmetic Dermatology. Ingrown Toenail in Children and Conservative Treatment Methods: A Case Report
In practice, the choice between floss and cotton often comes down to what stays in place better for a given person’s nail shape. Cotton wisps can be easier to position because you can pack a tiny amount directly under the corner without needing to thread anything through. But cotton absorbs moisture readily, which means it can become a bacterial sponge faster than dental floss. Waxed floss resists moisture better and tends to keep its shape longer between changes. On the other hand, floss can be harder to get under the nail initially because it is a single thin strand rather than a compressible puff. Some people find that using a small piece of cotton to start the lift and then switching to floss once there is a bit of room underneath is the most practical approach.
Neither method has been rigorously compared to the other in controlled trials. The evidence for all conservative home techniques is mostly observational and case-based, which is one reason doctors sometimes skip straight to more definitive treatments for anything beyond the mildest cases.
When Conservative Treatment Is Not Enough
The dental floss technique, cotton wedging, taping, and other at-home approaches are best suited for stage one ingrown toenails, where the issue is mild inflammation without infection or granulation tissue. Once an ingrown toenail advances beyond that point, recurrence rates with conservative methods climb. One study of patients treated with plastic tube splints reported recurrence in about one in five cases, and another using the gutter splint technique found that nearly half of patients had a poor response.2National Institutes of Health (PubMed Central). Steri-Strip Sling Technique – A Simple Procedure for the Management of Ingrown Toenails – A Prospective Study These are more advanced conservative techniques than dental floss, and they still struggled. If a professional-grade splint fails in a large proportion of cases, a piece of dental floss at home is unlikely to resolve a moderate or severe ingrown nail.
Signs that your ingrown toenail has moved past the home-treatment stage include persistent or worsening pain despite several days of conservative care, pus or foul-smelling drainage, tissue that has grown over the nail edge (granulation tissue), and red streaks extending away from the toe. People with diabetes, peripheral vascular disease, or compromised immune systems should generally skip home treatment altogether and go to a provider at the first sign of an ingrown nail, because infections in the feet can escalate quickly when circulation or immune response is impaired.
What Happens If You Need Professional Treatment
Clinicians have a range of options that go well beyond what you can do with floss and a bandage. For mild-to-moderate cases that have not responded to home care, orthonyxia, a non-invasive method that uses specialized braces or wire systems to gradually correct the curvature of the nail plate, has shown success in clinical case series.3Lechaschi Vrach. Conservative treatment of onychocryptosis with corrective systems: a series of clinical cases These corrective systems work over weeks to months, slowly flattening a nail that has become excessively curved, addressing the structural cause rather than just the symptom.
For recurrent or more severe cases, partial nail avulsion, where a doctor removes the offending strip of nail along one side, is one of the most common procedures. When combined with chemical matricectomy (applying a substance like phenol to the nail matrix so the removed strip does not grow back), recurrence rates drop considerably. One comparative study concluded that partial nail excision with phenol matricectomy offered low recurrence and minimal complications for people dealing with repeated ingrown toenails.4Scientific Research Journal of Medical Sciences. A Comparative Study of Partial Nail Avulsion with Phenol Matricectomy 50% Versus Partial Nail Avulsion Alone Regarding Complications and Recurrence Rate The procedure is done under local anesthesia in a clinic and typically takes about 15 to 20 minutes.
Nail fold resection, where the surgeon removes a wedge of the inflamed skin fold rather than part of the nail itself, is another approach. A review of studies using this technique found that postsurgical infection rates were reported as zero across all nine studies that tracked the outcome, though recurrence ranged from none to about one in five patients depending on the study.5PubMed Central. Operative treatment of ingrown toenail by nail fold resection without matricectomy
Common Mistakes That Make Ingrown Toenails Worse
People often try to “dig out” the ingrown corner of the nail with scissors or clippers before inserting floss or cotton. This is one of the most counterproductive things you can do. Cutting the nail short at the corner creates a sharp spicule that, as the nail grows, will dig even more aggressively into the skin fold. You end up in a cycle: cut, temporary relief, worse ingrowth within a week or two, cut again. The correct approach is to leave the nail corner alone and let it grow out past the skin fold while keeping it lifted with the floss.
Another common error is trimming the nail into a curved shape that follows the contour of the toe. Nails that are cut with rounded corners are more prone to growing into the skin than nails trimmed straight across. When you eventually trim the nail after the ingrown edge has grown out, cut straight across and file any sharp edges lightly. The corners should be visible above the skin line, not tucked into the groove.
Overpacking material under the nail is a subtler mistake. If you jam a thick wad of floss or cotton under the corner, you create pressure against the nail bed from below, which hurts, and you also stretch the skin fold open wider than necessary, potentially creating a new entry point for bacteria. A thin layer is all you need. Think of it as a shim, not a wedge.
Preventing Recurrence After the Nail Heals
Once the ingrown edge has grown out and the inflammation has resolved, the priority shifts to keeping it from coming back. Footwear is the single biggest modifiable factor for most people. Shoes that squeeze the toes together, especially in the toe box, apply lateral pressure on the nail plate and push the skin folds against the nail edges. If your shoes leave red marks or indentations on your toes when you take them off, they are too tight.
Trimming technique matters just as much as shoe fit. Keep the nail at a moderate length, not too short and not too long, and cut straight across. Toenails grow slowly, roughly a millimeter every couple of weeks for most adults, so monthly trimming is usually enough. If your nails tend to curl excessively as they grow, which can be partly genetic and partly related to chronic pressure from footwear, regular trimming at the right length helps prevent the edges from hooking into the skin before they get long enough to do so.
Some people are simply more prone to ingrown toenails because of their nail morphology. Naturally wider or more fan-shaped nails, nails with a pronounced transverse curvature (sometimes called “pincer nails”), and nails that are thick or irregular from fungal infection all increase the risk regardless of how carefully you trim. If you get ingrown nails repeatedly despite good footwear and trimming habits, a conversation with a podiatrist about corrective braces or a minor procedure to narrow the nail permanently is worth having. The dental floss technique is a useful first line for a single mild episode, but it is not a long-term management strategy for structurally prone nails.
Ingrown Toenails in Children
Children get ingrown toenails too, sometimes frequently, and the dental floss approach can work for them with some adjustments. The main challenge is cooperation. Younger children rarely tolerate the discomfort of having something threaded under an already tender nail, and a squirming child increases the risk of tearing the skin or pushing the floss in at the wrong angle. Conservative treatment for pediatric ingrown nails often relies on taping techniques, where medical tape is used to pull the nail fold away from the nail edge, or other gentle methods that do not require inserting anything under the nail.1Journal of Cosmetic Dermatology. Ingrown Toenail in Children and Conservative Treatment Methods: A Case Report
For older children and teenagers who can sit still and follow instructions, the floss method can be attempted much the same way as in adults, with the same caveats about stopping if the nail is too deeply embedded or if signs of infection appear. Children’s nails grow faster than adults’ nails, which is actually an advantage: the ingrown edge may grow past the skin fold more quickly, shortening the treatment period. On the flip side, children are harder on their feet, and the floss may need to be replaced more frequently if it comes loose during play or sports. Keeping a child in open-toed footwear during treatment can be a logistical challenge during colder months or when school dress codes require closed shoes.