Pain that spikes when you lie down is a common and genuinely uncomfortable pattern. There are a few plausible reasons, and the practical answer is the same: it is worth being seen promptly.
Lying flat changes blood flow to the head, which can increase pressure in an inflamed tooth.
Fewer distractions
Pain that was background noise during the day becomes the only thing happening.
Clenching
Some people grind or clench in their sleep, loading already-tender teeth.
Inflammation builds
Untreated inflammation tends to progress over hours, not resolve.
What to do tonight
Sleep propped up rather than flat. Take a pain reliever you normally tolerate, following the label. Keep the area clean. Avoid very hot, cold, or sweet food and drink. Do not put aspirin against the gum.
If you develop facial swelling, fever, or trouble swallowing, that changes the situation: seek urgent care rather than waiting for morning.
What we can explain here — and what needs an exam
A page can inform you. It cannot examine you.
We can explain online
Why position affects dental pain
What to do overnight
Which overnight symptoms are red flags
Determined after an exam
Which tooth is the source
Whether the nerve is involved
Whether root canal treatment or extraction is needed
What to do next
Call as soon as we open, or sooner if swelling develops. Night pain that keeps you awake usually means something that will not settle on its own.
General information reviewed by Mankirat Gill, DDS · August 2026. Not a substitute for an in-person examination. Severe pain, spreading facial swelling, or trouble breathing or swallowing: call us or seek emergency care now.