Walking out of the dentist’s office with a numb mouth can feel strange. Talking clearly, eating, or even smiling may feel awkward for a while. This temporary numbness is completely normal and is designed to keep you comfortable during your dental procedure.
How long that numb feeling lasts depends on the type of anaesthetic used, where it was injected, and how your body processes medication. Below, we explain what causes dental numbness, how long it typically lasts for different treatments, what to avoid while numb, and when to call your dentist.
Quick Answer – Dental numbing usually lasts 1 to 3 hours. Some anaesthetics can last up to 6 hours, especially for lower-jaw treatments or surgical procedures. The exact duration depends on the anaesthetic type, injection location, and individual metabolism.
Why Does My Mouth Feel Numb After Going to the Dentist?
When your dentist injects a local anaesthetic into your gums, it temporarily blocks nerves from sending pain signals to your brain. This creates a short-term “pause” in sensation so you don’t feel pain during treatment.
You may still feel pressure or movement, but pain is blocked. As the medication wears off, nerve signals gradually return to normal.
How Long Does Dental Numbing Last?
The duration of numbness depends largely on the anaesthetic used:
- Lidocaine: Lasts 1–3 hours. Common for fillings and routine procedures.
- Articaine: Lasts 2–4 hours. Penetrates deeper tissue for more involved work.
- Mepivacaine: Lasts 1–2 hours. Often used for shorter procedures.
- Bupivacaine: Lasts 4–6 hours or longer. Used for surgical treatments requiring extended pain relief.
How Long Does Dental Numbing Last for a Filling?
For most cavity fillings, numbness lasts 1 to 3 hours. Upper-tooth fillings often wear off faster than lower-tooth work because the upper jaw has better blood circulation, which helps clear the anaesthetic more quickly.
Can I Eat With a Numb Mouth?
It’s best to wait until numbness completely wears off before eating.
When your mouth is numb, you can’t feel injuries happening. Many people accidentally bite their lips, cheeks, or tongue without realizing it.
If you must eat:
- Choose soft, cool foods (yogurt, smoothies)
- Chew on the opposite side of the mouth
- Avoid hot foods and drinks
- Take small bites and eat slowly
Waiting a couple of hours is the safest option.
What About Driving After Dental Work?
- Local anaesthetic only: You can safely drive.
- Sedation (oral, nitrous, or IV): Do not drive. Arrange transportation and avoid driving for at least 24 hours.
Always confirm driving restrictions with your dentist before treatment.
Why Do Some People Stay Numb Longer Than Others?
Several factors affect how long dental numbness lasts:
- Metabolism: Faster metabolism clears anaesthetic more quickly
- Injection site: Lower-jaw injections tend to last longer
- Amount used: Multiple injections increase duration
- Individual response: Everyone processes medication differently
All of these variations are normal.
Can You Make Dental Numbness Wear Off Faster?
There’s no instant way to reverse numbness, but you can support your body by:
- Taking a light walk to improve circulation
- Staying well-hydrated
- Gently massaging the cheek near the injection site
Avoid strenuous activity and follow your dentist’s after-care advice.
Practical Tips While You’re Numb
- Avoid touching or testing the numb area
- Schedule important calls or meetings later
- Supervise children closely to prevent lip or cheek biting
- Use ice packs for swelling (15 minutes on, 15 minutes off)
- Take recommended pain medication before numbness fully fades
That Tingling Feeling—Is It Normal?
Yes. Tingling or “pins and needles” sensations mean your nerves are waking up. This usually lasts 15–30 minutes and is completely normal.
If tingling becomes painful or lasts several hours, contact your dentist.
When to Call Your Dentist
Call your dentist if you experience:
- Numbness lasting longer than 6 hours after routine treatment
- Increasing pain, swelling, warmth, or discharge
- Signs of an allergic reaction (rash, hives, breathing difficulty)
- Jaw stiffness that doesn’t improve
- Severe pain once numbness wears off
Get the Dental Care You Need
At Richmond & Springvale Dental Group, we believe informed patients feel more confident and comfortable. Our team explains every step of your treatment—including the anaesthetic used and what to expect afterward.
Have concerns about numbness or an upcoming procedure?
Book a same-day appointment at our Abbotsford or Springvale clinic—we’re here to help make your dental experience smooth and stress-free.
