A dental filling is one of the most routine dental procedures around. The goal is to remove decay and restore the tooth. But it’s not unusual to experience some discomfort in the days following the treatment. Most of the time this is completely normal, but occasionally the pain signals something that needs following up. Here’s how to tell the difference.
Why does a tooth hurt after a filling?
A certain amount of sensitivity after a filling is expected and normal. The drilling, even when done carefully, causes minor trauma to the tooth and surrounding tissue. The tooth needs a little time to settle. This typically shows up as sensitivity to hot and cold, or a slight ache when biting down.
How long this lasts depends on the depth and size of the filling. A small, shallow filling might cause only a day or two of mild sensitivity. A deeper filling, particularly one close to the nerve, can take longer to settle, sometimes a few weeks.
Sensitivity to hot and cold
Some sensitivity to temperature after a filling is very common and usually settles within a few days to a couple of weeks. Using a toothpaste designed for sensitive teeth can help during this period. If the sensitivity is severe or lasts more than a few weeks, it’s worth going back to your dentist.
Pain when biting down
If your bite feels off or you have pain when you chew, it’s possible the filling is sitting slightly too high. This is a simple fix. Your dentist can adjust the height of the filling in a short appointment. Don’t ignore this kind of pain, as biting on a filling that’s too high can cause ongoing discomfort and put stress on the tooth.
Throbbing or persistent pain
A dull throb or more persistent pain after a filling, especially one that doesn’t settle within two to four weeks, can be a sign that the filling has irritated the pulp (the nerve tissue inside the tooth). This is more likely with deep fillings. In some cases, the pulp inflammation settles on its own. In others, it can progress to a point where root canal treatment is needed. If the pain is significant or getting worse, see your dentist.
Sharp pain that wasn’t there before
A new, sharp pain on biting after a filling can sometimes indicate a tiny crack in the tooth that the filling procedure has exposed. This is worth getting checked, as cracks can propagate over time.
When to call your dentist
Get back in touch with your dentist if:
- The pain is severe or getting worse rather than improving
- The sensitivity or discomfort lasts more than four weeks
- Your bite feels uneven
- You have swelling, fever, or a bad taste in your mouth
- The filling feels loose or you think part of it has broken off
Most post-filling discomfort resolves without any further treatment. But if something doesn’t feel right, it’s always worth getting it checked. Dentists would much rather see you for a quick check than have a small issue turn into a bigger one.
