Tooth Hurts After a Filling: Is It Normal?

Had a filling, and now the tooth’s playing up. A twinge when cold water hits it. That dull ache when you chew on it. Or a sharp jolt out of nowhere that makes you wince. Short version: some pain after a filling is normal. Tooth pain after a filling usually calms down by itself in a few days, occasionally a week or two. The tooth’s just been drilled and packed with a new filling. It’s sore because it’s healing.

What you want to know is which ache you’ve landed with. The boring kind that fades. Or the kind that means get this looked at. Both are below.

Why does my tooth hurt after a filling?

Fixing a cavity means drilling out the rotten bit and filling the gap. All of that happens close to the nerve. And the nerve gets grumpy when it’s disturbed. So for a while it stays a little inflamed, and you feel that as sensitivity or a low ache. Bigger cavity, deeper filling, closer to the nerve. Those ache the longest.

Other things that can do it:

• Your bite’s off. A filling sitting a hair too high gets hit first every time your teeth come together. Constant little knocks. Stays sore.
• The material. Metal carries heat and cold more than white filling does, so the first week or two can feel sharper on a cold drink.
• Two fresh fillings side by side. Neighbouring teeth both filled, and the new surfaces rubbing together feels odd till you’re used to it.
• The tooth was already unhappy. Deep decay can mean the nerve was irritated before you ever sat in the chair. The filling didn’t start it. Just brought it out.

None of that means anything’s gone wrong. Normal reasons a filled tooth aches in the days after.

What normal settling pain feels like

Mild. And getting better, not worse. If it’s one of these and it’s fading, you’re fine:

• A fast zing off something cold, gone in a second
• Sore if you prod it or tap it
• A dull ache that’s a bit less each morning
• The tooth feeling “there” when you bite, but no real pain

Wait it out. Usually gone within a week or two.

How long should a tooth hurt after a filling?

Comes down to how deep the filling is and what state the tooth was in. Rough guide:

Past three weeks with no change? Or worse instead of better? Stop waiting and get it seen.

Does the type of filling change things?

A bit, yeah. White fillings stick to the tooth and don’t shift heat and cold around much, so people tend to notice less with them. The old silver amalgam ones conduct more. Cold gets through and gives the nerve a poke, early on especially. Neither’s a problem, just how they behave.

Swapped a metal filling for a white one lately? Or the other way round? Expect the tooth to feel different for a short while as it beds in. And the bigger the filling, whatever it’s made of, the nearer it sits to the nerve. Big ones stay touchy longest.

When the pain is not normal

Most of the time it’s nothing. But a few things are worth acting on. Here’s what to watch.

Biting hurts and won’t stop. Really common, and an easy fix. Filling’s a touch too high, your bite lands wrong, the tooth cops a knock every time you close. Leave it and it stays sore, and the nerve winds up more. Dentist checks the bite, shaves the high spot down, sorted. You usually feel better on the spot.

Still hurting after two or three weeks, or getting worse. Settling pain drops off. Pain that flatlines or climbs is a different message.

Hot and cold giving you sharp pain that hangs on. Quick zing, fine. Pain that sticks around thirty seconds after the cold’s gone? That nerve’s more upset than a filling should leave it.

Throbbing. Waking you at night. Aching for no reason at all. That’s the nerve inside properly inflamed. Might settle. Might need root canal treatment to sort for good. Get it seen either way.

Swelling, a foul taste, a little bump on the gum near it. That’s infection. Don’t leave it.

What if the pain comes back weeks or months later?

Take this one more seriously. A filling that was fine and then starts aching much later isn’t the usual after-treatment soreness. Could be fresh decay sneaking in around the edges. Could be the filling worn or come loose. Could be a crack in the tooth that’s opened up.

A tooth that was grand for months and turns sore isn’t settling down. It’s telling you something new’s going on. Don’t sit on it hoping it clears. These creep along quietly, and the longer you leave them the more of the tooth you lose.

What happens if you come in

Knowing what’s coming takes the edge off the nerves. Come in with a sore filled tooth and the dentist usually starts with your bite. Thin strip of coloured paper, bite down, and it shows up where the tooth’s catching. High spot gets a quick polish. Often you feel the difference before you’re out the door. They’ll look over the filling, check the tooth for cracks, test how the nerve’s doing. If the nerve looks like the problem, an x-ray goes deeper. Mostly it’s a small tweak. Once in a while it’s more, and getting in early is what keeps it that way.

Easing it at home while it settles

Nothing fancy. Bits that help in the meantime:

• Lay off very hot and very cold for a few days. Ease off the sugary stuff too.
• Chew on the other side while it quietens down
• Get a sensitive toothpaste. Does actually help with the cold twinges.
• Painkillers from the shop, taken as the packet says, if you need them
• Careful with hard or sticky food on that side

Tried all that and it’s still going? That’s your nudge to ring the practice.

Frequently asked questions