Is a root canal painful?
By Make Me Smile Dental Health Centre, Shastri Nagar Lane 2, Andheri West · Updated 1 October 2026
The short answer
With modern local anaesthetic, most people feel pressure and vibration during a root canal but not pain. The infection that leads to a root canal is usually far more painful than the treatment. Mild tenderness for a few days afterwards is normal and settles with simple painkillers.
Root canals have a reputation they don’t deserve. Much of it comes from decades ago, and from the pain of the infection itself, which people remember as “the root canal”.
What it actually feels like
- Numbing. You’ll feel a small pinch as the anaesthetic goes in. We wait until the tooth is fully numb, and check before starting.
- During treatment. You’ll feel pressure, vibration and the sensation of the instruments working, but not sharp pain. You can raise a hand to pause at any time.
- Afterwards. Once the anaesthetic wears off, the tooth may feel tender to bite on for a few days. Simple painkillers usually cover it.
Most people are surprised by how calm it is. Google lists “painless treatment” as the most-mentioned topic across our 730 reviews, with “root canal” close behind.
Why it’s worth doing
A root canal saves your own tooth. That keeps your bite stable, protects the teeth next to it and the bone underneath, and usually costs less in the long run than removing the tooth and replacing it with an implant or bridge.
Signs you might need one
- Throbbing pain, especially at night
- Sensitivity to hot or cold that lingers after the drink is gone
- Pain when biting
- A swelling or “pimple” on the gum near the tooth
- A tooth that has darkened
Read more about root canal treatment at Make Me Smile, or book a consultation. We’re open every day, including Sundays.
More questions
How many sittings does a root canal take?
Often one or two. A badly infected tooth may need an extra visit so the infection can settle before the canal is sealed.
What if the anaesthetic doesn’t work?
Tell us. Inflamed teeth sometimes need more anaesthetic or a different technique, and we won’t continue until the tooth is properly numb.
Do I need a crown after a root canal?
Back teeth almost always do, because a root-canal-treated tooth becomes more brittle. Front teeth sometimes manage with a filling.