“Is it normal for a filling to hurt a week later?”

Yes, I definitely recommend seeing a dentist to evaluate the tooth. Few reasons could be causing pain. The bite is high and need to be adjusted. The filling is deep close to the pulp.I recommend you call your dentist and schedule an appointment to get it evaluated soon.

It's normal to have some sensitivity following a tooth restoration, especially cold sensitivity. If the tooth is throbbing all the time, however, you should go back to the dentist who placed the restoration. This is VERY important because only that dentist knows exactly how close the decay was to the pulp chamber. If the restoration is large (i.e., there was a lot of decay), the tooth may require a crown or even a root canal and a crown. This will be determined by your dentist. There is one other possibility that can occur occasionally and that is a restoration that is too high in an area. As a dentist who used to do fillings (I'm an Oral Surgeon, so I have not done fillings in 20 years), there have been times when I had to adjust the occlusion (i.e., reduce) of the restoration I just placed. Traumatic occlusion to a new restoration can definitely make your tooth very sore/tender. If you are merely having cold sensitivity that lasts 5 seconds or less after you drink something cold, then I'd give it a few months (sometimes up to 6). I had a restoration done in dental school and the cold sensitivity finally went away, but it took almost 7 months. I just didn't drink anything really cold. If I did, that was a quick reminder!
Hope this helps.

Have a good weekend,

Dr. Bronk

No. It’s best to return to your dentist to find the cause of your pain. There are many reasons for post op pain beyond one or two days and it’s best to treat it soon. It could get worse.

Yes, depending on the depth of the cavity, some patients have sensitivity for a few weeks. If the tooth is throbbing, that’s not a good sign. You may need a root canal. Typical sensitivity after a filling is some hot/cold sensitivity.