Why Does My Tooth Hurt Worse at Night?

By Dr. Boris Zusin · Published August 1, 2026

If a toothache seems to save its worst moments for the second you lie down, that's not a coincidence — there's a real reason nighttime pain feels different, on top of whatever's actually causing it.

Why Lying Down Makes It Worse

Lying flat increases blood flow and pressure toward the head, which can intensify pressure inside an already-inflamed or infected tooth. There are also fewer distractions at night to compete with the pain for your attention, so it can simply feel more prominent once the room goes quiet.

What's Usually Behind It

A few common causes: a cavity that's progressed close to the nerve, a cracked tooth that's more irritated by pressure changes, grinding your teeth overnight (which can aggravate an already-sensitive tooth), or sinus pressure referring pain to the upper back teeth. Lingering, throbbing pain — rather than a brief twinge — often points toward the tooth's nerve being involved.

When to Call Us

Pain that wakes you up, doesn't ease with over-the-counter pain relief, or comes with swelling or a bad taste in your mouth are all signs to call rather than wait it out. We offer same-day emergency visits for exactly this kind of situation.

Dealing with a toothache tonight? See our dental emergencies page, or read more about what toothaches usually mean.