If you're reading this at 2 AM with a tooth that's throbbing too hard to sleep, you're in the right place. This is the most diagnostic pattern in dentistry — and it almost always has the same cause.
The nerve inside your tooth is severely inflamed — usually from a deep cavity, a cracked tooth, a failing filling, or repeated dental work on the same tooth. Once pulpitis is 'irreversible,' the nerve cannot heal on its own and the throb will keep escalating. Root canal treatment removes the inflamed nerve and resolves the pain.
If the nerve has already died, bacteria multiply at the root tip and form a pocket of pus. This is the most painful type of toothache: throbbing, often with swelling, sometimes with a fever or a bad taste. Treatment is root canal (or extraction) plus drainage; antibiotics may be added if there's facial swelling or systemic illness.
The roots of upper molars sit just below the maxillary sinuses, and a sinus infection can radiate into the upper back teeth as a dull, throbbing ache that's worse when you lie down. Multiple teeth ache together, and there's usually congestion or pressure across the cheek. This is the one cause on this list that doesn't need a root canal — but it does need accurate diagnosis.
If any of the following are true, treat this as an urgent same-day or after-hours problem. Call our office at (669) 234-2354 — or, if there's facial swelling that's spreading, fever, or trouble breathing or swallowing, go to the nearest emergency room first.
These are general comfort measures, not medical advice. If you have any health condition or take other medications, check with your physician or pharmacist before taking ibuprofen at the higher dose.
Three reasons that compound each other. (1) Physiologically: when you lie down, blood pressure increases inside the rigid pulp chamber of the tooth, which presses directly on the inflamed nerve. (2) Neurologically: recent endodontic research (Obadeh et al., J Endod 2026;52:62–67) showed that painful periapical lesions actually have more nerve fibers and higher expression of two pain-signalling sodium channels (Nav1.8 and Nav1.9) than asymptomatic ones — so once a lesion becomes 'symptomatic,' the tissue itself is wired up to amplify the signal. (3) Behaviorally: at night you have no work, conversation, or movement to distract from the pain. The throb is real, the wiring is real, and your awareness of it is also amplified. It's not in your head — it's three separate biological systems all pulling in the same direction.
Yes — for adults without contraindications, 600–800 mg of ibuprofen every 6–8 hours (with food) is the most effective over-the-counter regimen for tooth pain. You can alternate with 1000 mg of acetaminophen between doses for 'staircase' coverage. This buys time until you can be seen, but it does not fix the underlying problem.
Sometimes, partially, and slowly — but they won't cure it. Antibiotics can reduce swelling and bacterial load if there's a true infection, but the inflamed or dying nerve tissue inside the tooth doesn't heal with antibiotics. The American Association of Endodontists explicitly recommends against antibiotic monotherapy for irreversible pulpitis. The definitive treatment is root canal (or extraction).
If it's accompanied by facial swelling, fever, trouble swallowing or breathing, or pain that ibuprofen doesn't dent — yes, it's an urgent emergency. We see weekend emergencies on Saturday and Sunday 8 AM–3 PM. Without those red flags, it's still urgent but can usually wait until our next available appointment within 24–48 hours.
Sometimes — and that's worse, not better. When a severely inflamed nerve dies, the pain often disappears for a few days or weeks before coming back as a much more severe pain (and often facial swelling) when the dead tissue becomes infected. Treating it promptly is faster, cheaper, and saves the tooth.
Most patients walk out of the office with the throbbing already gone — the moment the inflamed pulp is removed, the pressure is relieved. Mild soreness from the procedure itself usually resolves within 2–3 days.
We reserve daily emergency time and are open Saturday and Sunday 8 AM–3 PM. Most patients leave the office with the throbbing already gone.
