How can you tell if a tooth nerve is infected or just inflamed?

Here are some indications that may help you differentiate between an infected and inflamed tooth nerve:

Toothache intensity and longevity: An infected tooth nerve often causes persistent and throbbing pain that becomes severe and may disrupt sleep. Inflammation-related pain tends to be milder and may come and go.

Pain sensitivity: A common symptom of an infected tooth nerve is sharp pain when biting or chewing, and extreme sensitivity to hot and cold. Tooth inflammation can also cause sensitivity but usually to a lesser degree.

Swelling of the face or gums: Infection of the tooth nerve can lead to a noticeable swelling in the cheek, around the jaw, or along the gums near the affected tooth. Swelling due to inflammation is less common.

Pus discharge: In the case of an infected tooth nerve, you may notice the presence of pus draining from the tooth or the surrounding tissues. Pus discharge isn't typically associated with inflammation alone.

Fever: A severe bacterial infection of the tooth nerve can sometimes cause a low-grade fever. Inflammation usually doesn't lead to fever unless accompanied by severe infection.

Tooth discoloration: A tooth with an infected nerve may develop a dark or grayish discoloration as the pulp inside dies. Tooth discoloration isn't typically caused by inflammation.

Swollen lymph nodes: In some cases, a bacterial infection of the tooth nerve can cause nearby lymph nodes (located usually along the neck or under the jawline) to swell and become tender. Swollen lymph nodes can also occur with inflammation, but less commonly.

It's important to see a dentist as soon as possible if you are experiencing any of these symptoms, as both nerve infection and severe inflammation require proper dental treatment to be resolved and prevent complications. The dentist will be able to accurately diagnose the problem and determine the appropriate treatment. Self-diagnosis and treatment of dental issues can be risky and should be avoided.