Gum Health
Why do I have a bump on my gum that looks like a pimple?
19 October 2026 · The Dentist, Al Qusais, Dubai
The short answer
A pimple-like bump on your gum, often called a parulis or gum boil, is almost always a sign that infection from a tooth is draining through the gum tissue. It usually traces back to a dead or infected tooth nerve, a failed old filling, or infection around a tooth root. It is not something to wait out, because the underlying infection does not resolve on its own and can flare up painfully later. See a dentist for an X-ray so the source tooth can be identified and treated, usually with a root canal or, in some cases, extraction.
What's actually happening under that bump
The bump you're seeing is called a parulis, and it's your body's way of relieving pressure. When a tooth's nerve dies, usually from deep decay, a crack, or trauma, bacteria multiply inside the tooth and travel down through the root to the bone at the tip. Pus builds up there and needs somewhere to go. Rather than spreading through the jaw, it often tunnels a path through the bone and gum, forming a small channel called a sinus tract, and exits at the surface as that pimple-like bump.
It may look alarming but feel oddly painless, which confuses a lot of people. The pressure that would normally cause pain has an escape route, so the area can feel fine for weeks even though the tooth underneath is actively infected. Some patients notice it comes and goes, shrinking when it drains and swelling up again as pressure rebuilds. That on-off pattern doesn't mean it's healing. It means the infection is still there, just cycling.
How to tell if it needs urgent attention
A few signs point to something that needs to be seen sooner rather than later: a bad taste when you press on the bump, swelling that spreads into the cheek or under the jaw, a tooth that feels tender to bite on or suddenly looser than its neighbours, or a low fever. Any of those suggest the infection is more active and you shouldn't wait for a routine appointment slot.
Even without those symptoms, a parulis on its own is reason enough to get checked. The tooth behind it has a dead or dying nerve in most cases, and that doesn't reverse itself. Left alone, the infection can slowly erode bone around the root, which makes later treatment more complicated and can eventually threaten the tooth.
What treatment usually looks like
A dentist will take an X-ray to find exactly which tooth is the source, since the bump itself doesn't always sit right above the problem tooth: infection can travel sideways through bone before surfacing. If the tooth's root canal system is the cause, which is the most common scenario, a root canal treatment cleans out the infected tissue inside the tooth, seals it, and removes the source of the infection. The gum bump typically settles within a week or two once the source is treated. In cases where the tooth is too badly damaged or cracked to save, extraction and replacement with an implant or bridge is the more sensible route, and your dentist will talk you through which option fits your situation.
At The Dentist in Al Qusais, Dr. Faris Alkhanafseh and Dr. Mohammad Nour see this fairly often, and the first checkup for new patients is free, which makes it an easy first step rather than a decision you have to agonise over. If you're noticing a bump like this, book a visit through WhatsApp or at thedentist.ae/book and get an X-ray done before it has a chance to flare up into something more painful.
This article is general information, not a diagnosis. If you are in Dubai, the free first checkup at our Al Qusais clinic is the fastest way to get an answer about your own teeth.