The short answer
Lying flat increases blood pressure in your head, which raises pressure inside an inflamed tooth — that's why night is worse. Elevate your head, alternate ibuprofen/acetaminophen as directed, cold compress, salt-water rinse — and call (613) 491-3300 at opening. Swelling affecting breathing or swallowing means ER, now.
Why Night Turns the Volume Up
A tooth's nerve lives in a rigid chamber with zero room for swelling. When that nerve is inflamed — deep decay, a crack, infection — several nighttime factors converge:
- You lie down. Horizontal means more blood pressure to the head, more pressure in the tooth, more pain. This is the big one — and why the pain often eases when you stand up.
- Distraction disappears. The pain was there at 2 p.m. too; your brain was busy.
- Nighttime grinding squeezes an already-angry tooth.
- Sinus pressure builds when horizontal, and upper back teeth share real estate with the sinuses.
One important decode: throbbing pain that wakes you, or lingers minutes after a hot drink, usually means the nerve is dying — that's root canal or extraction territory, and it won't fix itself. Brief zings with cold that vanish instantly are usually less urgent.
Getting Through Tonight
- Prop yourself up — two or three pillows, or a recliner. Elevation alone often drops the pain a level or two.
- Medicate properly — ibuprofen (Advil) is particularly good for dental inflammation; acetaminophen (Tylenol) can be alternated with it. Follow the labels; don't exceed maximums; check both against your health conditions.
- Cold compress, outside the cheek — 15 minutes on/off. Never heat — heat feels nice and feeds the swelling.
- Warm salt-water rinse — half a teaspoon in a cup of warm water, gently. Especially helpful if food is packed around the tooth; floss the area gently too.
- Avoid triggers — very hot, very cold, sweet, and chewing on that side.
- Skip the folk remedies that harm — no Aspirin against the gum (it chemically burns tissue), no whisky treatment, no numbing gel overuse.
Tomorrow Morning, Make the Call
Nighttime pain severe enough to wake you almost always signals a problem that's still growing — an inflamed nerve becomes an abscess on its own schedule. We hold same-day emergency appointments for new and existing patients: call (613) 491-3300 at opening, or use the emergency request form at 3 a.m. so we see it first thing.
Can't-wait signs (ER, not us, tonight): swelling affecting breathing or swallowing, swelling spreading toward the eye or neck, high fever with facial swelling, or trauma beyond the tooth. Our dentist vs. hospital guide covers the full triage.