Important information for the time until the numbness wears off — also for parents of children.
The most important rule
Do not eat until the anaesthesia has completely worn off!
While the lip, cheek or tongue are numb, there is a risk of biting or burning yourself — without noticing. This applies especially to children!
How long does the anaesthesia last?
The duration depends on the type and location of the anaesthesia. Here is a guide:
Infiltration anaesthesia (upper jaw)
The most common type of anaesthesia. Works locally. Duration: approx. 1–3 hours. Usually in the upper jaw or front teeth area.
Nerve block anaesthesia (lower jaw)
Numbs a larger area — half the lower lip, tongue and cheek become numb. Duration: approx. 3–5 hours. Sometimes slightly longer.
Fully worn off
Sensation returns slowly. First tingling, then normal feeling. Only then eat!
Varies individually: The exact duration depends on your body, the anaesthetic used and the amount. For some patients the numbness wears off faster, for others it takes a little longer — both are normal.
While the anaesthesia is active
You may
Drink water (carefully, small sips)
Speak normally — even if it feels strange
Brush teeth on the non-numbed side
Continue daily activities
Drink cool beverages
Please avoid
Eating and chewing (risk of bite injuries!)
Hot drinks (risk of burns!)
Biting, chewing or sucking on the numb area
Testing lip or cheek with your teeth
Smoking (also delays absorption)
Information for parents — children after anaesthesia
Children are particularly at risk of injuring themselves after anaesthesia. The numb feeling is unfamiliar and fascinating — children often bite, chew or suck on the numbed lip or cheek without feeling any pain.
The result can be painful swelling, wounds or bruises that only become visible after the numbness wears off and hurt for days!
Observe
Keep an eye on your child for the first 2–3 hours. Make sure they do not chew or suck on their lip.
Explain
Tell your child: "Your lip is sleeping right now. Please don't bite or suck on it — even if it feels funny!"
Distract
An audiobook, a book or a film can help pass the time and distract your child from the numb area.
Only then eat
Only give your child something to eat once they can fully feel their lip again. Then: soft food (yoghurt, porridge, soup).
What is normal — and what is not?
Completely normal:
Numbness in lip, cheek, tongue or chin for several hours
Slight tingling as the numbness fades
Feeling of a "fat lip" (but the lip is not actually swollen!)
Slight pressure at the injection site
Please contact us if:
The numbness has not subsided after more than 8 hours
An eye droops or does not close properly
Allergic reactions occur (rash, swelling, shortness of breath)
Your child has significantly injured their lip or cheek despite being watched
Driving & work
A local anaesthetic usually does not affect your ability to drive. You may normally drive yourself home after treatment.
Exception: If you have also received a sedative or feel unsure, please arrange to be picked up.
