# Will it come back? Phenolisation and why regrowth is rare

> The regrowth numbers, honestly: what phenolisation does to the nail matrix, the real success rates, what a rare regrown spike looks like, and how the healed nail looks.

The question everyone asks while their toe is being dressed: "so is that it, for
good?" The honest answer: almost certainly yes. Done properly, with the nail
matrix phenolised, partial nail avulsion has regrowth rates in the low single
digits. It is one of the most reliably permanent minor procedures in medicine.
Here's why, and what the small print honestly says.

## Why this fix is permanent when clipping never was

Every previous round of clipping, digging and even simple nail-edge removal
failed for the same reason: the factory kept running. Nail grows from the matrix,
a strip of specialised tissue under the base of your nail. Remove the visible
edge and the matrix simply manufactures a new one, often sharper, on the same
collision course with your skin fold.

Phenolisation closes the factory, but only the corner of it. During
[the procedure](/advice/what-happens-during-ingrown-toenail-surgery/), after the
ingrowing strip is removed, the few millimetres of matrix that produced it are
treated with phenol. That corner stops producing nail permanently. The rest of
the matrix carries on, so you keep a nail; it's just narrower by the width of
the problem.

## The numbers, without marketing

Study after study on phenolised partial avulsion lands in the same place:
success rates in the mid-to-high 90s percent, with regrowth in the low single
digits. Compare simple avulsion without phenol, where the edge regrows in a
substantial minority of cases, several times the phenol rate, because the
matrix was left intact and simply resumed work.

Two practical consequences. First, if you've "had this surgery before and it came
back", the overwhelmingly likely explanation is that the matrix was never
chemically treated, and the proper version remains available to you. Second,
whoever treats you, one question sorts the field:
**"do you phenolise the matrix?"** The answer should be an immediate yes. Mine
is. (Cost and what's included are covered
[here](/advice/ingrown-toenail-surgery-cost/).)

## What the rare regrowth looks like

I won't pretend the number is zero, so here's what the low-single-digit case
looks like in practice. Months after healing, a small spike or sliver of nail
appears at the treated edge, occasionally tender the way the original was. It's
not a failure restarting the whole saga: a regrown spike is a small retreat, far
more minor than the original procedure. If you ever see one, whether at week
eight or year three, come and show me rather than negotiating with it yourself.

What regrowth is not: the normal forward growth of the rest of your nail, which
continues happily, or the slightly odd look of the nail during the first months
while the fold remodels. Your review appointment exists partly so you know
exactly what your normal now looks like.

## Will it look normal?

Close enough that you'll stop thinking about it. The nail is permanently a few
millimetres narrower on the treated side, sitting a touch lower into the fold.
In sandals, at the lido, across a room: unremarkable. Under polish: invisible.
Against the red, swollen toe you've been hiding all summer, it is a decisive
upgrade, and I've yet to meet the patient who wanted their old nail width back.

## The bottom line

A recurring ingrown toenail is a subscription: pain, flare, appointment, repeat.
Phenolised nail surgery cancels the subscription, permanently in the high
90s percent of cases, with a small, fixable exception clause. If your toe has
re-offended more than once, you already know it isn't going to reform on its
own. Book the assessment online, and let's retire it properly.

## Quick answers

### What is the success rate of ingrown toenail surgery with phenol?

High. Published studies consistently put regrowth after partial nail avulsion with phenolisation in the low single digits, and most regrowths that do occur are minor spikes that are simply retreated.

### Why did my nail grow back after previous surgery?

Usually because the matrix wasn't chemically treated: simple avulsion (pulling the nail edge without phenol) has regrowth rates several times higher. Ask any provider whether they phenolise; it's the difference that matters.

### Will my toenail look normal after partial removal?

Close to it. The nail is permanently a few millimetres narrower on the treated side, which most people, including the person attached to the toe, stop noticing within months. Polish covers it completely.

### If it does regrow, do I have to pay for full surgery again?

A regrown spike is assessed and usually retreated as a much smaller procedure. Raise it at your review or get in touch when you notice it; regrowth appearing months later should always be looked at.

## Related treatment

[View the related treatment guide](/treatments/nail-surgery-shepperton/)