A tooth that grumbled all afternoon becomes the only thing in the world at two in the morning. That is not your imagination, and it is not you being dramatic. Several ordinary things line up against you at night, and a couple of them can be undone in the next ten minutes.
This page is written for that hour: what to do before morning, what to stop doing, and how to tell the difference between a tooth that needs a dentist tomorrow and a swelling that needs a hospital tonight.
Why the pain climbs when you lie down
The nerve of a tooth lives in a small chamber with hard walls on every side. When it is inflamed it swells, like any other injured tissue, and it has nowhere to swell into. Pressure inside the chamber goes up, and pressure on a nerve is pain.
Lying flat sends more blood to your head than standing does. That is fine everywhere else in your body, and it is the one place a tooth notices: a little more pressure in a space that is already full. Most people describe the difference as the pain changing character, from an ache during the day to a throb the moment their head goes down.
Two other things arrive at the same hour and get less credit for it. The painkiller you took at bedtime is wearing off around now, which is exactly when the pain seems to spike. And there is nothing else happening: no work, no conversation, no screen, nothing to put between you and the sensation. Pain that had competition all day has the room to itself at 2am.
- More blood to the head when you lie flat, in a nerve chamber that cannot expand
- The evening dose of painkiller wearing off in the small hours
- Nothing else to hold your attention
- Clenching or grinding in your sleep, which loads a cracked or inflamed tooth all night
- A late meal, or food packed into a cavity or under a loose filling
What actually helps between midnight and morning
Sleep propped up. Two or three pillows, or a chair if bed is impossible, so your head sits above your heart. It is the cheapest thing on this list and usually the most noticeable.
Take a painkiller you already know you can take, at the dose on the packet. Dental pain is inflammatory, so ibuprofen tends to suit it better than acetaminophen for people who can take it, and some people are told by a pharmacist or a dentist to take both together. The packet decides the dose, and a pharmacist can tell you in a minute whether a combination is safe with your other medicines. Nothing on this page is a prescription.
Cold on the outside of the cheek, twenty minutes on and twenty minutes off, wrapped in a cloth. Many people with an inflamed nerve also find that cold water held in the mouth calms it, and there is no harm in trying, though it is worth knowing that dentists read that particular relief as a sign the nerve is in trouble rather than a sign it is settling.
Rinse gently with warm salt water if food is packed around the tooth, half a teaspoon in a glass. Keep to soft food, chew on the other side, and leave anything very hot, very cold or very sweet alone until you have been seen.
What makes it worse, including things people try at 3am
Aspirin held against the gum burns the tissue and does nothing for the tooth. Painkillers work through your bloodstream, not by touching the sore spot. A chemical burn on top of a toothache is a bad night made worse.
Heat on the face is the other common mistake. A hot water bottle or a warm compress feels soothing for a minute and can make a swelling spread. Cold outside the cheek, always, and never heat once there is any swelling at all.
Leftover antibiotics from an old prescription are not the answer either. They will not touch the pressure inside a tooth, they will not fix what is causing it, and a partial course makes the infection harder to treat when somebody finally does treat it.
The rest of the list is short. Alcohol does not help and interacts with painkillers. Smoking slows healing. Poking at the tooth with a pin or a fingernail introduces bacteria. Clove oil, the traditional standby, can burn the gum if it is used neat and often, so use it sparingly on cotton if you use it at all.
The signs that mean tonight rather than tomorrow
Almost all toothache can wait for a phone call in the morning. A small number of things cannot, and they are all about a spreading infection rather than the pain itself. Go to a hospital emergency room, tonight, if any of these are true:
An emergency room can drain a swelling, start antibiotics and give you something for the pain. What it usually cannot do is treat the tooth, so a hospital visit is a stop on the way to a dentist rather than a substitute for one. Our guide to dental emergencies has the fuller list, and the signs of a dental abscess are worth reading if your face has started to change shape.
- Swelling that is closing your eye, or spreading down your neck
- Trouble swallowing, trouble breathing, or a voice that has changed
- Swelling under the tongue or in the floor of the mouth
- A fever with facial swelling, or feeling genuinely ill rather than sore
- A jaw you cannot open more than a finger or two
- Bleeding that will not stop, or a tooth knocked out by a blow
What the pain is probably telling you
A tooth that wakes you up is a different animal from a tooth that twinges on cold and settles in seconds. Sensitivity comes and goes with a trigger. Pain that arrives on its own, lingers for minutes, and is worse lying down usually means the nerve inside the tooth is inflamed beyond the point where it recovers.
That matters because it changes what happens next. Sensitivity is often managed with a toothpaste and a filling. An inflamed nerve is treated by taking the nerve out, which is a root canal, or by taking the tooth out. Our guide on a root canal or an extraction explains how that choice actually gets made, and it is worth ten minutes before you are sitting in a chair being asked.
One more thing to expect. If the pain stops on its own after a few bad nights, that is not always recovery: a nerve that dies stops sending signals, and the problem quietly moves to the tip of the root, where it can build into an abscess weeks later. Keep the appointment either way.
If the tooth in question is a wisdom tooth at the back, with a flap of gum over it, that has its own pattern and its own answers in wisdom tooth pain.
Getting seen in the morning
Ring at the moment the practice opens rather than later in the day. Emergency slots are kept back for exactly this and they are given out by the front desk on a first come basis, so eight in the morning is worth an hour of waiting on hold at eleven.
If you have no dentist, or yours cannot see you today, search every practice near you by town or ZIP code and ask several at once rather than one at a time. One request goes to all the practices you tick, which on a morning when you have not slept is the difference between one call and six.
Tell them it kept you awake. It is the phrase practices use to sort urgent from routine, and it is true.
The short version
- Lying flat raises the pressure in an inflamed tooth, so sleep propped up on two or three pillows.
- Ibuprofen suits dental pain better than acetaminophen for most people who can take it: the packet sets the dose, and a pharmacist can check it against your other medicines.
- Cold on the cheek helps, heat can make a swelling spread, and aspirin held against the gum burns it.
- Pain that wakes you usually means the nerve is inflamed past recovery, which is a root canal or an extraction rather than a filling.
- Swelling near the eye or neck, trouble swallowing or breathing, or a fever with a swollen face means a hospital tonight.
- Ring at opening time and ask several practices at once: emergency slots go early.
Looking for a dentist?
Our directory lists every dental practice in the United States, from the public federal registry. Search by town or ZIP code, or let your browser find the closest ones.
Frequently asked
Why does my toothache only hurt at night?
It hurts during the day too, but it has competition. At night the painkiller you took at bedtime wears off, there is nothing to distract you, and lying flat sends more blood to your head, which raises the pressure inside a tooth that cannot swell. Propping your head up undoes part of that.
Should I go to the emergency room for a toothache at night?
Not for pain alone. Go tonight if there is swelling closing your eye or spreading down your neck, trouble swallowing or breathing, a fever with a swollen face, or a jaw you cannot open. A hospital can treat a spreading infection but usually cannot treat the tooth, so you will still need a dentist.
What is the best painkiller for a toothache at night?
For most people who can take it, ibuprofen suits dental pain better than acetaminophen, because the pain is inflammatory. Some people are advised to take both. Follow the dose on the packet and ask a pharmacist if you take other medicines, are pregnant, or have stomach or kidney problems.
Does sleeping sitting up really help a toothache?
It helps enough to be worth doing. Keeping your head above your heart reduces the blood pressure in the vessels feeding the tooth, which is the part of night pain you can change without a prescription. Two or three pillows is usually enough, and a recliner is better than lying flat.
My toothache stopped on its own. Do I still need a dentist?
Yes. Pain that fades after several bad nights often means the nerve has died rather than healed, and the problem moves to the tip of the root where it can build into an abscess weeks or months later. The tooth is still treatable now and harder to treat then.
Can I put a painkiller on the tooth itself?
No. Aspirin or a crushed tablet held against the gum causes a chemical burn and does nothing to the nerve inside the tooth, because painkillers work through the bloodstream. Swallow the tablet, and use cold on the outside of the cheek instead.
This is general information to help you ask better questions, not a diagnosis and not a prescription. Doses come from the packet or a pharmacist, and anything happening in your own mouth needs a dentist who can look at it.