Tooth pain is easy to brush off. A lot of us do it. We tell ourselves it’ll settle down, or we swap to chewing on the other side and move on with our day.
But some symptoms are trying to tell you something more serious. They can be a sign of infection deep inside the tooth, and only root canal therapy can properly resolve it.
In this guide, we’ll walk through five key warning signs you might need a root canal. We’ll explain why early treatment matters, and we’ll bust a few common myths about the procedure along the way. If you’re in Melbourne and something in this list sounds familiar, it’s worth booking a check-up sooner rather than later.
What Is Root Canal Therapy?
Root canal therapy is a dental procedure that removes infected or inflamed pulp from inside the tooth. The pulp is the soft tissue that holds the nerves and blood vessels. Once it’s inflamed or infected, it can’t heal on its own.
The treatment cleans out the canal, disinfects it, and then seals it up. This saves the natural tooth rather than pulling it out.
Here’s the myth we want to dispel early: root canals have a reputation for being painful. In reality, modern root canal treatment is generally no more uncomfortable than getting a filling. The pain people associate with root canals usually comes from the infection itself, not the treatment that fixes it.
Oral health issues are more common across Australia than most people realise. Around 1 in 3 adults report feeling uncomfortable about their dental appearance, and plenty of that discomfort traces back to untreated decay or damage that could have been caught earlier.
5 Signs You May Need a Root Canal
Persistent or Severe Tooth Pain
This is usually the first thing people notice. If you have tooth pain that doesn’t ease off, especially when you chew or apply pressure, it could be a sign that the pulp inside the tooth is inflamed or infected.
The pain might come and go at first. Over time, it tends to get worse, not better. If chewing on that side has become something you actively avoid, that’s worth paying attention to.
Lingering Sensitivity to Hot or Cold
A quick zing when you bite into ice cream is normal. What’s not normal is sensitivity to hot or cold that lingers well after the stimulus is gone.
If a sip of tea leaves your tooth aching for a minute or more afterwards, that’s often a sign the nerve inside the tooth is affected. Healthy teeth settle quickly. Inflamed ones don’t.
Swelling or Tenderness Near a Specific Tooth
Swelling or tenderness in the gum near the affected tooth is another common warning sign. It often means the infection has spread from inside the tooth out into the surrounding tissue.
You might feel tender when you press on the gum, or the area may look slightly puffy compared to the rest of your mouth. Either way, it’s not something that should be left untreated.
Discolouration or Darkening of the Tooth
A tooth that’s darkening or turning a greyish colour compared to its neighbours can indicate the blood supply inside the tooth has been damaged. This often happens after an injury, but it can also develop slowly from untreated decay reaching the pulp.
Discolouration doesn’t always come with pain, which is exactly why it catches people off guard.
A Recurring Pimple-Like Bump on the Gum
A pimple-like bump on the gum, especially one that keeps coming back, is a visible sign of infection. Dentists call this a sinus tract, and it’s essentially your body’s way of draining an abscess near the root.
It might not hurt much, and it may even disappear for a while before returning. That cycle is a strong signal that professional dental care is needed.
What Happens If You Ignore These Signs?
Leaving any of these symptoms untreated rarely makes them go away. More often, the infection keeps building.
- Abscess formation. An untreated infected tooth can develop into a painful abscess, which may spread to nearby teeth, the jaw, or even further into the body.
- Tooth loss. Left untreated for long enough, the affected tooth may become impossible to save, leading to extraction.
- More complex treatment later. Catching the signs early generally means simpler treatment. Delaying it can mean more extensive dental work down the track.
This pattern of delay is common across Australia more broadly, not just with root canals. Around 3 in 10 people who needed to see a dental professional delayed seeing one or didn’t see one at all in the past 12 months, and roughly 2 in 10 said cost played a part in that delay. The trouble is that delaying treatment can lead to bigger problems, and bigger problems are usually harder and more time-consuming to fix.
The hospital system feels the flow-on effect too. Close to 88,600 hospitalisations for dental conditions in 2023–24 could potentially have been avoided with earlier treatment.
What to Expect During Root Canal Therapy
If your dentist suspects you need a root canal, the process usually looks like this.
- Diagnosis. Your dentist will examine the tooth and take an X-ray to see how far the infection has spread and confirm a root canal is needed.
- The procedure. The dentist removes the infected pulp from inside the tooth, cleans and disinfects the canal, and then seals it. A crown or filling is often placed afterwards to protect and restore the tooth.
- Appointments and recovery. Most root canal treatment is completed over one or two appointments, depending on the complexity of the affected tooth. Mild tenderness for a few days afterwards is normal, and it usually settles quickly.
Root Canal vs Extraction: Why Saving the Tooth Matters
When a tooth is badly infected, there are generally two options on the table: root canal therapy or extraction. Where possible, most dentists will recommend saving the natural tooth.
Keeping your natural tooth helps preserve your bite, your jaw alignment, and how your other teeth sit in your mouth. Replacing an extracted tooth later, whether with an implant or a bridge, is usually a bigger and more involved process than a root canal would have been in the first place.
That said, extraction does sometimes become the only option. If the tooth structure is too badly damaged or if the infection has caused extensive bone loss around the root, root canal treatment may no longer be viable.
Either way, seeing your dentist as soon as symptoms appear gives you the best chance of choosing the less invasive path.
Don’t Wait for the Pain to Get Worse
If you’re noticing any of these signs, don’t wait for things to worsen. Persistent tooth pain, lingering sensitivity, swelling, discolouration, or a recurring bump on the gum are all reasons to book in and get checked.
Root canal therapy is a well-established, effective treatment that can save your natural tooth and prevent the infection from spreading further. The sooner it’s addressed, the more straightforward the recovery tends to be.
Book a consultation today to find out whether root canal therapy can save your tooth.
FAQs
Is root canal therapy painful
Not typically. Modern techniques and local anaesthetics mean the procedure feels similar to having a filling. Most discomfort actually comes from the infection beforehand, not the treatment itself.
How long does a root canal take
Most root canal treatment is completed in one to two appointments, depending on how many canals the tooth has and how advanced the infection is.
How much does root canal therapy cost in Australia
Costs vary depending on the tooth, the complexity of treatment, and whether a crown is needed afterwards. Your dentist can give you a personalised quote after an examination.
Will I need a crown after a root canal
Often, yes. A crown protects the treated tooth from cracking and helps it function normally again, particularly for back teeth that take on more chewing pressure.
What happens if a root canal is needed but delayed
The infection can spread, potentially leading to an abscess or tooth loss. Early treatment is generally simpler and more comfortable than treatment started later.
