Do You Need a Root Canal? 6 Signs to Watch For
Sep 21, 2026
Tooth pain doesn't always mean you need a root canal — but ignoring the wrong symptoms can turn a simple fix into a much bigger problem. Root canals treat infection or inflammation inside the tooth, and catching the signs early can mean the difference between saving your natural tooth and losing it. Here are six signs that it may be time to see a dentist.
At BH Dental NY, Dr. Leslie Azran and the team diagnose and treat root canal-related issues for patients throughout Harlem and Brooklyn.
Pain that lingers, especially deep, throbbing pain that doesn't go away, is one of the most common signs of an infected tooth. This is different from the brief sensitivity you might feel from a cold drink it's pain that sticks around and often gets worse over time.
If biting down or chewing sends a sharp pain through a specific tooth, the nerve inside may be inflamed or infected. This kind of localized pain is a strong signal that something is happening beneath the surface.
Some sensitivity to temperature is normal. But if the discomfort lasts well after the hot or cold food or drink is gone, rather than fading quickly, it may point to nerve damage inside the tooth.
Swelling around a specific tooth, or gums that feel tender to the touch, can indicate an infection spreading from inside the tooth into the surrounding tissue.
A small, pimple-like bump near a tooth (sometimes called a gum boil or fistula) is often a sign of a dental abscess. It may drain fluid and cause a bad taste, and it should never be ignored.
A tooth that turns gray, dark yellow, or black, without an obvious injury, often means the tissue inside the tooth has died or is dying. This is one of the clearer visual signs that a root canal may be needed.
| Sign | What It May Mean |
|---|---|
| Persistent pain | Infection or nerve inflammation |
| Pain when chewing | Nerve irritation or damage |
| Lingering hot/cold sensitivity | Nerve damage inside the tooth |
| Swollen or tender gums | Spreading infection |
| Gum bump or boil | Dental abscess |
| Tooth discoloration | Dying or dead tissue inside the tooth |
Left untreated, an infected tooth doesn't heal on its own. The infection can spread to surrounding teeth, the jawbone, or even other parts of the body in more serious cases. What could have been treated with a root canal may eventually require extraction if the damage progresses too far.
If your symptoms came on suddenly or you're in significant pain, don't wait for a routine appointment. Our emergency dentistry services are available for patients dealing with acute tooth pain, swelling, or injury in Harlem and Brooklyn.
Many of these signs can overlap with other dental issues, so the only way to know for sure if you need a root canal is a proper exam. The team at BH Dental NY will assess your symptoms, take any necessary X-rays, and recommend the right treatment to relieve your pain and protect your tooth.
If you're experiencing any of the signs above, contact BH Dental NY or book an appointment online today.