That Sharp Pain When You Bite Down
Yep, that's your tooth trying to tell you something isn't right. Let's figure out what's going on and what to do about it.
In one sentence: Pain when biting down usually means a tooth is cracked, has a deep cavity, or the nerve inside is inflamed (pulpitis), and it should be checked by a dentist.
Quick Answer
Most of the time, pain when you bite down means you've got a cracked tooth, a bad filling, a deep cavity, or maybe even an infection (called an abscess). It hurts because the pressure from biting is hitting a weak spot. If it's just a little twinge now and then, it might not be a huge deal, but if it's a sharp pain every time, you should get it checked out.
What You Need to Know
Healthy teeth shouldn't hurt. Period. So if you feel a sharp pain or a dull ache in one spot when you bite, something's up with the tooth or the gums around it. The pressure from chewing is basically squeezing a damaged part of your tooth, and it doesn't like that.
A cracked tooth is the usual suspect. These cracks can be so small you can't even see them, but when you bite, the crack opens up just enough to irritate the nerve inside. Ouch. The weird thing is, the pain can come and go, which makes it tricky to know exactly which tooth is the problem.
But it's not always a crack. It could also be a cavity that's gotten deep enough to tick off the nerve. Or maybe an old filling has decided to retire—it might be cracked, loose, or have tiny gaps where gunk can get in. Sometimes, it's an infection at the root of the tooth, which is no fun at all. And hey, sometimes it's just a new filling or crown that's a little too high and needs to be filed down.
So, what to do? If the pain is minor and doesn't happen often, you can wait and see for a couple of days. But if it's a sharp pain that shows up every time you bite, it's getting worse, or you see any swelling, it's time to call the dentist. Don't wait for it to get worse. You can even send a photo to DentaSmart to get a quick look first.
Possible Causes
Cracked Tooth
medium urgencyA tiny, often invisible crack in the tooth flexes when you bite, bugging the nerve inside.
Deep Cavity
medium urgencyA cavity has gotten close to the tooth's nerve, and pressure makes it hurt.
Bad Filling
medium urgencyYour filling is old, cracked, or loose, letting bacteria sneak in and cause trouble.
Dental Abscess
high urgencyThis is an infection at the root of the tooth. Biting down puts pressure on it, causing pain.
Uneven Bite
low urgencyA new filling or crown is a bit too high, so it takes all the pressure when you bite.
Sore Ligament
medium urgencyThe little ligament that holds your tooth in place can get sore from grinding, a knock to the mouth, or an infection.
What You Can Do at Home
Try not to chew on the side that hurts until you see a dentist.
Ibuprofen can help with the pain and any swelling.
Rinse your mouth with warm salt water. Just mix half a teaspoon of salt in a cup of warm water.
Stay away from foods that are super hot, cold, or hard. They can make it worse.
Don't keep biting down on the tooth to see if it still hurts. You'll just make it angrier.
You can upload a photo to DentaSmart to get a first opinion.
When to See a Dentist Urgently
This information is for education only and does not replace professional dental care. See a dentist as soon as possible if:
- It hurts every single time you bite down.
- The pain is definitely getting worse.
- You notice your cheek or gums are getting puffy or swollen.
- You have a fever along with the tooth pain.
- You can actually see a crack, a hole, or a dark spot on your tooth.
- A chunk of your tooth or an old filling broke off.
Questions to Ask Your Dentist
Is the pain from a crack, cavity, or nerve inflammation?
Do I need an X-ray to see what is happening below the surface?
Could this be related to a recent filling or dental work?
What treatment options do I have, and which do you recommend?
Is there a risk of losing this tooth if I wait?
Key Takeaways
Pain when you bite isn't normal. It's a sign your tooth is probably cracked, has a cavity, or is infected.
A cracked tooth is the most common reason, and you often can't see the crack yourself.
While you wait for your dental appointment, just chew on the other side and take some ibuprofen.
DentaSmart can take a look at a photo or X-ray to give you an idea of what's going on.
