Tooth Pain That Won't Quit: Signs You May Need a Root Canal

Published on
June 2, 2026
Tooth Pain That Won't Quit: Signs You May Need a Root Canal

You chew on one side of your mouth because the other side hurts.

Cold drinks make you wince.

You tell yourself you'll wait another week and see if the pain settles down.

Sound familiar?

Not every toothache means you need a root canal. But when pain lingers, gets worse, or starts affecting your daily routine, it's often a sign that something more serious is happening inside the tooth.

What Is a Root Canal?

A root canal is a procedure used to remove infected or damaged tissue from inside a tooth.

Inside every tooth is a soft tissue called the pulp. This area contains nerves and blood vessels. When the pulp becomes inflamed or infected, the tooth can become extremely painful.

A root canal removes the damaged tissue, cleans the inside of the tooth, and helps preserve the natural tooth structure.

Despite what many people have heard, modern root canals are often no more uncomfortable than having a filling placed.

Persistent Tooth Pain

This is usually the symptom that gets people's attention.

Maybe the pain started as an occasional annoyance.

Then it became harder to ignore.

Pain that lasts for days or weeks may indicate inflammation or infection inside the tooth. While some toothaches come and go, ongoing pain should always be evaluated by a dentist.

A tooth doesn't typically hurt for no reason.

Sensitivity That Doesn't Go Away

It's normal to feel temporary sensitivity after eating ice cream or drinking hot coffee.

What's not normal?

A sharp or lingering pain that stays around long after the hot or cold item is gone.

If sensitivity lasts for several seconds or even minutes, the nerve inside the tooth may be affected.

Pain When Chewing

Some patients don't notice pain until they bite down.

The tooth may feel fine most of the day. Then every meal becomes a reminder that something isn't right.

Pain while chewing can indicate a crack, deep decay, or infection affecting the tooth's inner structures.

The longer these issues remain untreated, the greater the risk of additional damage.

Swollen or Tender Gums

Sometimes the tooth isn't the only area sending warning signs.

You may notice:

  • Swelling around a specific tooth
  • Tender gums
  • A pimple-like bump on the gums
  • Drainage near the affected area

These symptoms can point to an infection that requires prompt attention.

A Tooth That Has Darkened

Most people expect a painful tooth to signal a problem.

Not every infected tooth hurts.

In some cases, a tooth may gradually become darker than neighboring teeth. This can happen when the nerve inside the tooth has been damaged.

Changes in color should never be ignored, especially if they appear suddenly.

When Tooth Pain Becomes an Emergency

Some symptoms deserve immediate attention.

Contact a dentist right away if you experience:

  • Severe, throbbing pain
  • Significant swelling
  • Fever accompanied by dental pain
  • Difficulty swallowing
  • Facial swelling

In situations like these, visiting an emergency dentist may help prevent the infection from becoming more serious.

Don't Wait for the Pain to Get Worse

One of the biggest mistakes people make is waiting until the pain becomes unbearable.

Unfortunately, dental infections rarely resolve on their own.

The earlier a problem is diagnosed, the more options are usually available to save the tooth and avoid more extensive treatment.

If you've been dealing with persistent tooth pain, sensitivity, swelling, or discomfort while chewing, learn more about Root Canal Therapy or contact Decatur Woods Dental to schedule an evaluation.

Ready to Talk With a Dentist?

Have a question about your teeth, symptoms, or treatment options? Call Decatur Woods Dental in Indianapolis and our team can help you decide what to do next.