Is it bad when after you get a cavity filled have tooth aches?

Experiencing toothaches after getting a cavity filled is not uncommon, and it does not necessarily indicate something wrong. Here are a few reasons why you may experience toothaches after a cavity filling:

1. Sensitivity to Temperature: After a cavity filling, the tooth may become sensitive to hot or cold temperatures. This sensitivity usually subsides within a few days or weeks as the tooth adjusts to the filling material.

2. Post-Operative Pain: Some discomfort or pain is normal after a filling procedure due to the drilling and manipulation of the tooth. This discomfort should gradually decrease over time.

3. High Filling: Occasionally, the filling may be placed slightly higher than the surrounding tooth structure, causing discomfort when biting or chewing. This can be easily corrected by the dentist during a follow-up appointment.

4. Pulp Irritation: In rare cases, the filling may be deep and close to the dental pulp (nerve), which can cause irritation. This type of pain is usually more intense and may require further treatment, such as a root canal.

5. Infection: If there was significant decay before the filling, there's a chance that bacteria may still be present in the tooth. This can lead to infection and pain.

If the toothache is severe, persistent, or accompanied by other symptoms like swelling, fever, or pus discharge, it's essential to contact your dentist for an evaluation. They can assess the situation, identify the cause of the pain, and provide appropriate treatment.