How to Tell a Tooth Needs a Root Canal
Most people find out the same way. They sip coffee, feel a jolt, and the ache doesn't go away. That lingering part matters more than the jolt itself.
Healthy nerves react fast and quit fast. A tooth that hurts for thirty seconds or three minutes after the cold is gone is telling you the nerve is inflamed. Once it's inflamed badly enough, it doesn't heal on its own. That's the line between sensitivity and a nerve problem, and it's the single most useful thing you can notice at home.
Here are the signs we look for when someone calls about a tooth:
- Pain that hangs around after hot or cold instead of fading right away
- Throbbing that gets worse lying down or wakes you up at night
- Sharp pain when you bite or chew on one specific tooth
- A small pimple or bump on the gum near the tooth, sometimes with a bad taste
- Swelling in the gum, cheek, or jaw on that side
- A tooth that's turned gray or darker than its neighbors
And here's the part nobody expects. Sometimes the pain stops completely, and people think they're in the clear. They're not. When a nerve dies, the pain often quiets down for a while before the infection spreads into the bone. We see this every single week, usually from someone who felt fine for a month and then woke up with a swollen face.
A deep cavity, a cracked filling, or an old crown can all lead here. So can a tooth that took a hit years ago.
Not sure which category you're in? That's normal. An x-ray and a couple of quick tests on the tooth settle it in a few minutes, and at our Peoria office every x-ray gets a second-opinion review before we tell you what we see.






