Symptoms, explained
A gum boil: what that little pimple is trying to tell you
A small spot on the gum that swells up, pops, leaves a strange taste — and then comes back. It usually doesn’t even hurt much, which is exactly why it’s so easy to ignore. Here’s what it really is, and how we fix it at the source.
This page can’t diagnose you. Different problems can look the same on the gum. The tests in the chair — a cold test, a gentle tap, an X-ray — make the call. You’re not expected to know what’s causing it. That’s our job. This page just helps you understand what you’re seeing and what to expect.
The honest news up front: a gum boil keeps coming back until the tooth behind it is treated — but once it is, the boil usually heals by itself within days to two weeks.
Toothache right now? We keep same-day slots — and we answer.
Call nowA pimple that pops, drains, and comes back
That little spot is usually a tiny drain. Somewhere nearby, a tooth has quietly died inside — often after deep decay, a big filling, or a knock years ago — and infection at the tip of its root is slowly pushing pus out through the gum. The pimple is simply the exit.
That’s also why it barely hurts: the pus never builds up pressure, because it keeps escaping through the little hole. No pressure, no pain. But the infection is still there, working away quietly under the surface.
Finding the tooth behind it is a neat little test: we gently slide a soft, flexible point into the tiny tunnel and take an X-ray. The point shows up on the picture and leads us straight to the root that’s causing the trouble — which matters, because the guilty tooth is not always the one right next to the pimple.
Sometimes there’s no pimple at all — the same kind of quiet infection shows up as a dark shadow on a routine X-ray before you ever feel a thing. Same cause, same fix.
What you should do
Book an appointment in the next week or so — even though it doesn’t hurt. A boil that keeps coming back means an infection that never actually left, and it’s far easier to sort out now than after it flares up.
How we fix it — and why antibiotics and rinses won’t
It’s tempting to hope a course of antibiotics or some salt-water rinsing will clear it up. Being straight with you: they won’t — and it’s worth understanding why. The infection lives inside a tooth that no longer has a blood supply, so medicine travelling in your bloodstream can’t reach it. Rinses only wash the exit. Until the inside of the tooth is cleaned, the boil keeps returning.
So the fix targets the source, starting with the gentlest option that will actually work:
- Root canal treatment cleans and seals the inside of the tooth so you keep it. Once the inside is clean, the boil normally heals on its own within days to two weeks. Back teeth then need a protective cover (an onlay or crown) to last.(from R3,500)
- If the tooth has already had a root canal, the old root filling may need to be redone to reach the part that was missed — dentists call this retreatment.
- If retreatment can’t reach the infection, a small procedure at the tip of the root can clean it out from the other end and seal it — often the last step that still saves the tooth.
- Extraction if the tooth can’t be saved, or you choose not to — with an honest conversation about what, if anything, should replace it.
What you should do
When you book, tell us if the tooth has had a root canal or a crown before — it changes where on this ladder we start. Either way, we’ll talk you through the options before anything happens.
If it suddenly starts throbbing or your face swells — different rules apply
Sometimes that little drain blocks. The pus can’t escape any more, pressure builds fast, and the “painless” pimple becomes anything but: constant throbbing, a gum or cheek that’s ballooning, a foul taste, a tooth that feels too tall to bite on — maybe feeling feverish or generally unwell. That’s the same infection turned acute: an abscess that can no longer drain.
We know how frightening it is when it’s your face swelling. This deserves same-day care, and the fix is releasing the pressure and draining the infection at its source — not a prescription of antibiotics on its own. Antibiotics can back the treatment up when an infection is spreading or you’re feverish, but by themselves they only buy time. Once it’s drained, relief tends to come quickly — same-day help is usually possible.
What you should do
Contact us the same day — even if the boil bursts and the pain suddenly eases. The infection is still there, and it can flare up again.
Go to an emergency department NOW — don’t wait for us — if you have: swelling under the tongue or into the neck, difficulty swallowing or breathing, an eye swelling shut, or rapidly spreading facial swelling with fever. These are medical emergencies first and dental problems second.
What it costs
Every price above is a genuine “starting from” for the straightforward case. We quote before we treat — always. If you’re on a medical aid, we claim directly: you pay only co-payments and anything your plan doesn’t cover or has already used up.
On a medical aid? See what your scheme’s published benefits say — and we confirm with a benefit check before treatment.
Not sure which pattern is yours?
Tell us what you’re feeling — we’ll take it from there.