Tooth pain at night has a way of feeling far worse than the same ache during the day, and you're not imagining it. Lying down sends more blood to your head, there's nothing to distract you, and the throbbing takes over. Here are the six common causes, plus what actually helps you get through the night.
Why is your tooth pain worse at night?
First, the thing keeping you awake. Tooth pain at night genuinely intensifies, and there's a simple reason. When you lie down, blood pools in your head and increases pressure around an already inflamed tooth. During the day you're busy, talking, eating, moving, so the pain stays in the background. At 2am there's silence and a dark ceiling, and the throbbing has your full attention.
That doesn't mean the cause is mysterious. Night pain almost always points to one of a handful of dental problems. Knowing which one helps you decide whether to ride it out till morning or call sooner.
6 common night tooth pain causes
The list of night tooth pain causes is shorter than you'd think, and almost all of them are fixable. Here are the usual suspects we see again and again.
1. A deep cavity. Decay that has reached the inner layers of the tooth gets irritated by warmth, sugar, and the pressure of lying down. This is the classic late-night toothache.
2. An infected or dying nerve. When the pulp inside a tooth becomes infected, the pain is deep, throbbing, and often worse flat on your back. This kind usually needs a root canal to settle for good.
3. A dental abscess. A pocket of infection at the root brings constant, severe pain, sometimes with swelling or a bad taste. This one is not a wait-and-see situation.
4. Teeth grinding. Many people clench or grind in their sleep without knowing it. You wake with sore teeth, a tight jaw, and a dull headache around the temples.
5. A cracked tooth. A crack you can't see can flare up at night, especially after chewing something hard earlier in the day.
6. Food trapped or wisdom tooth trouble. Something wedged between teeth, or a partly erupted wisdom tooth with inflamed gum around it, can throb once you settle down for the night.
Tooth pain at night: how to get relief tonight
You want to sleep. Here are safe ways to get some toothache relief until you can be seen.
Prop your head up with an extra pillow so blood doesn't pool around the tooth. Rinse gently with warm salt water to clean the area and calm the gum. A cold compress held against your cheek for short spells can numb a throbbing area. Avoid very hot, very cold, or sugary food and drink right before bed, since they all trigger an irritated nerve.
Over-the-counter painkillers can help you get through the night, taken as directed on the packet. One thing to skip though. Don't place an aspirin or any tablet directly against the gum or tooth, because it burns the soft tissue and does no good. The painkiller works from the inside, not by sitting on the spot.
What not to do
A short list, because these make things worse. Don't ignore it for days hoping it clears, since dental pain that wakes you rarely fixes itself. Don't keep chewing on that side. And don't poke at the tooth with pins or hard objects to dig out food, because you can damage the gum or the tooth.
What happens when you finally get seen
Once you're in the chair, the first job is finding the source. A quick exam and usually a digital X-ray show whether it's a cavity, an infected nerve, an abscess, or a crack. That part is fast. From there the fix depends on what's found.
If it's a deep cavity caught in time, a filling may settle it. If the nerve is infected, a root canal cleans out the infection and the throbbing stops for good. An abscess often needs the infection drained and treated. And if grinding is wearing your teeth down, a custom night guard protects them while you sleep. The point is simple. None of these get better by waiting, and most are far easier to treat early than late.
When does night tooth pain mean you call a dentist?
Some night pain can wait for a morning appointment. Some can't. Call your dentist promptly, or seek urgent care, if you have any of these: swelling of the face or jaw, a fever along with the toothache, pain so severe that painkillers barely touch it, a bad taste from a spot on the gum, or trouble swallowing or opening your mouth. These point to spreading infection and need attention quickly, not next week.
For anything that's clearly an emergency, like fast-growing swelling or unbearable pain, don't tough it out at home. Reach our emergency dental care and call straight away so we can see you fast.
And if the underlying cause turns out to be an infected nerve, the fear of treatment often holds people back longer than it should. It really shouldn't, and our piece on whether a root canal is painful clears that up honestly.
Where to start
Tooth pain at night feels worse because of the way you lie down, but the cause is almost always a real dental problem, most often decay, an infected nerve, an abscess, or grinding. The home tricks here can buy you a night's sleep, but they don't fix the cause. Get the tooth checked, and if there's swelling, fever, or pain that won't quit, call right away rather than waiting for morning.
Frequently Asked Questions
Why does my tooth only hurt when I lie down?
Lying flat increases blood flow and pressure in your head, which presses on an already inflamed tooth nerve. During the day, being upright and busy keeps the pain in the background. At night, the quiet and the position together make the same ache feel much more intense.
Can I just take a painkiller and wait until morning?
Sometimes, if the pain is mild and there's no swelling or fever. A painkiller taken as directed can get you through one night. But if pain is severe, your face is swelling, or you feel feverish, don't wait. Those signs mean infection that needs prompt dental attention.
Is salt water rinse actually helpful for a toothache?
Yes, a warm salt water rinse can calm an irritated gum and clean trapped food from around a sore tooth. It won't cure a cavity or infection, but it does ease symptoms safely. Rinse gently a few times a day, and still get the tooth properly checked.
Does teeth grinding cause night tooth pain?
It can. Many people clench or grind their teeth in their sleep without realising it, which leaves teeth sore and the jaw tight by morning. If you wake with aching teeth, a stiff jaw, and headaches around the temples, mention it to your dentist. A night guard often helps.