How long does numbness usually last after a filling?
Numbness after a filling usually wears off over a few hours. How long depends on which anesthetic was used, whether it contained a vasoconstrictor, how much was given, where the injection was placed (lower back teeth numbed by a nerve block often stay numb longer than upper teeth numbed next to the tooth), and your own metabolism. Lip, cheek and tongue numbness usually outlasts the tooth itself. Numbness that persists the next day, or altered sensation such as tingling, burning or loss of taste, is uncommon and deserves a call to the office.
Why the tooth and the soft tissue recover on different clocks
The anesthetic bathes a nerve trunk or the small nerves around the tooth. Sensation returns as the drug is carried away by blood flow. The tooth, with its small nerve supply, often recovers first; the lip and tongue, served by larger nerves, take longer. The American Dental Association describes local anesthesia and its typical duration of a few hours (ADA).
Expected versus call
| Expected | Call the office |
|---|---|
| Numbness for 1-5 hours; longer for a lower nerve block | Numbness still present the next morning |
| Tingling as feeling returns | Tingling, burning or electric sensations that persist |
| A tender spot at the injection site for a day or two | Loss of taste; drooping that persists |
| Difficulty speaking or drinking while numb | A bitten lip or cheek that is swollen or not healing |
While you are numb
Do not eat anything that needs chewing; sip cool drinks; do not test the area by biting; keep children from chewing their lip. Avoid hot drinks, which can burn unnoticed.
Options you can ask about
Some practices use a medication that shortens numbness, or choose shorter-acting anesthetics for short procedures. Ask before the visit if numbness interferes with work or speaking.
Why prolonged numbness is reported
Rarely, a nerve is bruised by an injection; most such cases recover over weeks to months, and early reporting lets the dentist document and monitor it. This page gives no doses and does not name anesthetics.
If any of these apply, this is not a dental-office problem first: trouble breathing or swallowing, rapidly spreading swelling of the face or neck, fever with facial swelling, bleeding that will not stop, or a serious injury to the head or jaw. Call 911 or go to the nearest emergency department. Do not use the appointment request form for these.
Next step: Request a consultation or call (805) 565-5111. A request is not a confirmed appointment; the office confirms times during its listed hours (Monday to Thursday, 8 am to 5 pm, plus select Fridays).
Expected-versus-call checklist
| Time since injection | Expected | Call |
|---|---|---|
| 1-3 hours | Numb tooth, lip, tongue | |
| 3-6 hours | Feeling returning; tingling | |
| Evening | Mostly normal; injection site tender | |
| Next morning | Normal | Still numb; burning; taste changed |
| Days later | Injection site settled | Bitten lip or cheek swollen or not healing |
Guides are general education; an examination is needed for individual advice.
Sources
- MouthHealthy: Anesthesia and Sedation — American Dental Association
- Clinician statement — Loul Dental Studio
- Clinician statement — Loul Dental Studio
Sources were current when this guide was last updated.
Educational content, not a diagnosis. Please contact the studio to discuss your own situation.