It is normal for your lip and tongue to stay numb for a few hours after a lower tooth extraction while the local anaesthetic wears off. Paraesthesia is different. It is numbness, tingling or altered sensation that lasts beyond the anaesthetic, caused by irritation or injury to a nerve near the tooth. After lower wisdom tooth removal the reported rate of inferior alveolar nerve disturbance ranges from about 0.35 to over 8 percent depending on the case, and while that sounds worrying, the great majority recover fully within weeks to a few months.
Key takeaways
- Short-lived numbness from local anaesthetic is normal and wears off within hours.
- Paraesthesia is altered sensation that lasts beyond the anaesthetic, due to nerve irritation or injury.
- It mostly affects lower wisdom tooth removals, involving the lip, chin or tongue.
- Most cases resolve on their own, often within three months, and permanent change is uncommon.
- Reporting it early lets your dentist or surgeon monitor recovery and refer if needed.
The one distinction that matters: normal numbness versus lasting paraesthesia
The single most useful thing to understand is the timeline. Numbness on the day of an extraction is just the anaesthetic and is expected. If numbness, tingling or a strange sensation in the lip, chin or tongue is still there the next day, that is paraesthesia and is worth reporting. Knowing this difference stops people panicking on day one and stops them ignoring a sign that should be tracked.
Which nerves are involved
Two nerves sit close to the lower back teeth and account for most cases:
- The inferior alveolar nerve runs through the lower jaw near the roots of the molars and supplies feeling to the lower lip and chin on that side. It is the nerve most often affected by lower wisdom tooth surgery.
- The lingual nerve runs close to the tongue side of the lower molars and supplies sensation, and some taste, to that side of the tongue.
Because these are sensory nerves, paraesthesia affects feeling and sometimes taste, not the ability to move the face.
What it feels like
People describe a range of sensations, including numbness, tingling or pins and needles, a furry or rubbery feeling, reduced sensation, an altered or dulled sense of taste, and occasionally a heightened or uncomfortable sensitivity. It may affect biting the lip without realising, dribbling when drinking, or not feeling food on one side. These effects can be a nuisance but usually settle as the nerve recovers.
Why it happens and who is more at risk
Paraesthesia happens when a nerve is stretched, bruised, compressed or, rarely, cut during surgery, or sometimes irritated by swelling or the injection itself. Several factors raise the risk, and a good clinician weighs them up before surgery:
- A wisdom tooth root lying very close to the nerve canal on the X-ray.
- Deep or horizontally impacted lower wisdom teeth.
- Older age, with one body of evidence suggesting higher risk over the mid-twenties.
- More difficult or longer surgical removals.
Where imaging shows the tooth sitting right on the nerve, a cone beam CT scan may be used to plan the safest approach, and in selected cases a technique that deliberately leaves a small part of the root behind, called a coronectomy, can reduce risk.
What recovery usually looks like
Most nerve disturbances after extraction are temporary. Many resolve within days to weeks, and a large share of those that persist still recover by around three months as the nerve heals. The longer a deficit lasts unchanged, the lower the chance of full recovery, which is why a sensation that is not improving by about three months is usually referred for specialist assessment. Genuinely permanent change is uncommon overall, though it is not impossible, particularly after difficult removals.
| Timeframe | What it usually means |
|---|---|
| Hours after surgery | Normal local anaesthetic effect |
| First few days to weeks | Most paraesthesia begins to improve |
| Up to about 3 months | Many remaining cases continue to recover |
| Beyond 3 months, no change | Specialist review usually recommended |
What you can do
Report any numbness that is still present the day after surgery so it can be recorded and tracked. While the area is numb, be careful with hot food and drinks and avoid biting the lip, cheek or tongue, since you cannot feel injury to them. Keep all review appointments so recovery can be mapped over time. If your clinician recommends it, early referral to an oral and maxillofacial surgeon gives the best options where intervention might help.
Frequently asked questions
Is numbness after an extraction normal?
On the day, yes, that is the anaesthetic. Numbness that is still present the next day is paraesthesia and should be reported.
Will the feeling come back?
In most cases yes. The majority of nerve disturbances recover on their own, often within three months.
Does paraesthesia affect how I move my face?
No. The nerves involved carry sensation and sometimes taste, not muscle movement, so your facial movements are not affected.
Can paraesthesia be prevented?
Risk cannot be reduced to zero, but careful imaging, surgical planning and techniques such as coronectomy in high-risk cases all help lower it.
When should I worry?
If there is no improvement by around three months, ask about referral. Worsening pain or spreading numbness should be reviewed sooner.
Report it early, then let it heal
Lasting numbness after a lower extraction is uncommon and usually temporary, but it is always worth reporting so recovery can be tracked. For broader context on lower extractions, see our guides to the extraction recovery timeline and telling apart a dry socket from infection. To discuss wisdom teeth and nerve risk before surgery, talk to the team at Lumi Dental.
This article is general information and not a substitute for advice from your treating dentist or oral surgeon.
