How Long Will My Teeth Be Sensitive After a Filling?

A little tooth sensitivity after a filling is normal and usually settles within a few days to two weeks. Deeper fillings placed close to the nerve can take up to four weeks to settle completely. Mild, steadily improving sensitivity is a normal part of healing.

The tooth has just had decay removed and a new material bonded in place, and the nerve inside needs a short while to settle back down. Knowing what a normal recovery looks like and when to call your dentist takes most of the worry out of those first few days.

This guide covers how long tooth sensitivity after a filling usually lasts, why it happens, how to ease it at home, and when it’s a good idea to see a dentist.

 How long does sensitivity after a filling normally last?

Most people notice sensitivity settling within three to seven days, with any lingering tenderness fading over the following week or two. For deeper fillings, or ones placed close to the nerve, mild sensitivity can take two to four weeks to disappear completely.

During that time, you might notice the tooth reacting to:

• Hot or cold food and drink
• Sweet things like chocolate or fruit juice
• Biting down or chewing on that side

Sensitivity that is mild and slowly improving is nothing to worry about. NHS patient guidance advises contacting your practice for a review if sensitivity hasn’t settled within four weeks.

 Why is my tooth sensitive or painful after a filling?

Even a routine filling involves a small amount of drilling and preparation, and that can leave the tooth reactive for a little while. A few things can be behind it:

• The nerve is settling: Your tooth has living tissue, called the pulp, beneath the enamel and dentine. When a cavity is deep or close to the pulp, it can become mildly inflamed during treatment (a normal healing response known as reversible pulpitis) and remain tender until it subsides.
  
  
• Your bite has changed slightly: A new filling can sit a fraction higher than the tooth around it. Until it beds in or your dentist adjusts it, biting and chewing on that side may feel sharper or more noticeable.
  
  
• Cold travels to the nerve more easily: Sensitivity to cold is especially common. Cold triggers tiny fluid movements within the microscopic channels running through the dentine, and the nerve registers that movement as a quick, sharp twinge. As the tooth heals, the reaction fades.
  
  
• The filling material conducts temperature: Some materials pass heat and cold through more readily than others. Silver amalgam conducts heat more than tooth-coloured composite, which is one reason composite fillings feel more comfortable with hot drinks and cold water.
  
  
• The gum was disturbed: If the gum around the tooth was moved or held back during treatment, the area can feel tender for a day or two afterwards. This usually eases quickly.

 How to ease tooth sensitivity at home

While the tooth settles, here’s how to make the healing period more comfortable:

• Use a desensitising toothpaste: Products like Sensodyne help calm the nerve signals in the dentine. They work gradually, so brush with one twice a day and keep it up for a few weeks.
• Switch to a soft-bristled brush: Softer bristles reduce pressure on the tooth and the gum around it.
• Go easy on temperature extremes: Steer clear of ice-cold drinks, very hot food and anything spicy for the first few days.
• Chew on the other side: If only one side was treated, favour the opposite side while the tooth recovers.
• Take over-the-counter pain relief if you need it: Paracetamol or ibuprofen, taken as directed, can take the edge off any ache. Check with your pharmacist if you’re unsure what’s suitable for you.

Keeping up with regular hygiene appointments also helps your gums and teeth stay healthy while everything settles, and gives your dental team a chance to spot anything that needs a closer look.

 When to see a dentist about sensitivity after a filling

Most post-filling sensitivity clears up by itself. Some symptoms, though, suggest the tooth needs another look. Contact your dentist if:

• The sensitivity is getting worse
• Discomfort lasts longer than four to six weeks, or is still there six weeks after the filling
• You get a sharp, stabbing pain, or pain that lingers after the hot or cold has gone
• It hurts to bite or chew, not just when the tooth meets something hot or cold
• You notice swelling, a bad taste, or throbbing pain that keeps you up at night

These can be signs that the filling is sitting too high, the nerve is more irritated than expected, or there’s a small crack in the tooth. A quick bite adjustment is often all that’s needed, but the earlier it’s checked, the simpler the fix can be.

If you’re in severe pain outside of normal hours, NHS 111 can point you to urgent dental care. Tooth Club also offers emergency dental care across our UK clinics if you need to be seen quickly.

 Fillings and aftercare at Tooth Club

Comfort guides how our GDC-registered dentists approach every filling, from careful diagnosis through to the aftercare that follows. We use modern tooth-coloured composite materials that bond closely with your natural tooth and cause less lingering temperature sensitivity than older metal fillings.

If your filling was placed on the NHS and needs a small adjustment afterwards, that follow-up is included within the same course of treatment, so there’s no reason to put up with a bite that doesn’t feel right.

Whether your filling was with us or elsewhere, our clinics are a phone call away if you’d like reassurance or a follow-up.