Why do my lips and tongue go numb or tingly sometimes?

Most of the time, numb or tingly lips and tongue have a simple explanation, like dental numbing medicine, low blood sugar or fast breathing. But because a few rarer causes are genuine emergencies, it's worth knowing what to watch for.  

Sudden numbness with weakness, speech changes or breathing trouble needs emergency care. The exact cause depends on what happened before the feeling started and what other symptoms you have. 

What you will learn in this article: 

• Numbness after dental work should improve as the numbing medicine wears off. 

• Low blood sugar, oral allergies and fast breathing can also affect feeling around your mouth. 

• Recurring numbness needs an exam because many conditions can cause it. 

• Sudden numbness with one-sided weakness, speech trouble or breathing trouble is an emergency. 

If tingling or numbness in your lips or tongue keeps happening, schedule an appointment with an Aspen Dental provider. Your care team can check your teeth, gums and jaw for a cause and guide your next step. 

What causes numb or tingly lips and tongue? 

A few things can trigger this feeling. Some are dental. Some are not. 

Can a dental procedure cause it? 

Yes. Numbing medicine can leave your lip, tongue or cheek numb for a few hours after dental treatment. The feeling should lessen as the medicine wears off. 

In rare cases, a procedure or injection can irritate a nerve and cause tingling that lasts longer. A 2024 systematic review found that the lower-jaw and tongue nerves can be affected during implant placement, wisdom tooth removal, root canal treatment or anesthetic injections. Inflammation and pressure in the treated area can also affect nerve function during the first week. Contact your dental provider if the numbness is not improving after a week or is getting worse.¹ 

If you have a numb or tingling lower lip after dental work, tell your provider when it started and whether it is improving. Do the same if your gums or tongue remain sore after a filling. 

Could low blood sugar be the cause? 

It can. The American Dental Association lists tingling or numbness of the lips or tongue as a possible sign of low blood sugar. Other signs include shaking, sweating, hunger, dizziness or confusion. If you have diabetes, follow your low-blood-sugar plan and check your glucose if you can. Get emergency help if you cannot eat or drink, have a seizure or lose consciousness. High blood sugar can also damage nerves over time and may lead to neuropathy.² 

Can allergies cause tingling lips? 

An oral allergy can make your mouth, lips or tongue feel itchy or prickly. The American Academy of Allergy, Asthma & Immunology says this type of reaction can begin after eating uncooked fruit or vegetables. Nuts may cause similar mouth symptoms and can sometimes lead to a more serious reaction. Call 911 if you develop severe throat swelling or trouble swallowing or breathing.³ 

Can TMJ or jaw problems cause it? 

Jaw joint problems can cause pain, stiffness, painful clicking or trouble opening your mouth. Numbness is not a reason to assume a temporomandibular joint (TMJ) problem is the cause. If tingling happens with jaw symptoms, a dental provider can examine the area and check whether another cause needs attention. 

Can sinus problems cause numb lips? 

Sinus problems can cause pressure or pain near your upper teeth and face. However, lip or tongue numbness should not be blamed on sinus pressure alone. Ask a medical or dental provider to check numbness that is new or keeps returning. 

Can anxiety cause numb or tingly lips? 

Yes. Stress or panic can cause fast, deep breathing, which lowers the amount of carbon dioxide in your blood. MedlinePlus notes that this type of breathing, called hyperventilation, can cause numbness or tingling around the mouth. Fast breathing can also have a medical cause. Seek medical care if it is your first episode, feels severe or keeps getting worse.⁴ 

When should you see a dental provider versus seek urgent care? 

See a dental provider when tingling follows dental work, does not fade as expected or comes with tooth, gum or jaw symptoms. If no dental cause is found or the feeling keeps returning, you may also need an evaluation from a doctor. 

Call 911 if the numbness starts without warning and comes with: 

• Weakness or numbness in the face, arm or leg, especially on one side 

• Trouble speaking or understanding speech 

• A sudden change in vision 

• Trouble walking or loss of balance 

• A sudden severe headache 

The CDC says these may be signs of a stroke. Call 911 even if the symptoms fade after a few minutes. Do not drive yourself to the hospital. Ask for an ambulance.⁵ 

Also call 911 if your lips, tongue or throat swell and you have trouble breathing or swallowing. These can be signs of a serious allergic reaction. 

How will a dental provider figure out the cause? 

Your dental provider will ask when the tingling started, how long it lasts and what seems to trigger it. They may also ask whether it affects one or both sides and whether you recently had dental work. Share your health history, allergies and medicines too. 

Your dental provider may examine your teeth, gums, tongue and jaw. They may check how well you can feel touch in the area or take an X-ray if they suspect a dental cause. If the problem does not appear to come from your mouth or jaw, they may suggest that you see a doctor, neurologist or allergist. 

Don't wait out repeat episodes of numb or tingly lips and tongue on your own. Contact your local dental provider to review your symptoms and find out whether a dental cause is behind them. 

Why do my lips and tongue go numb or tingly sometimes? FAQs 

Still have questions about numb or tingly lips and tongue episodes? These answers cover a few common concerns. 

How long does dental numbness usually last after a procedure? 

It depends on the type of numbing medicine used and the procedure itself. Longer-acting anesthetics or more involved procedures, like wisdom tooth removal or implant placement, can leave numbness lasting longer than a routine filling. If yours hasn't started improving within a week, let your dental provider know. 

Can stress alone cause tingling lips without hyperventilation? 

Stress may change your breathing before you notice it. If you are not breathing fast or deep, do not assume stress is the cause. Tingling that keeps returning should be evaluated. 

Are numb lips and tongue always linked to teeth? 

No. Blood sugar changes, food reactions, fast breathing, nerve problems and other conditions may cause these feelings. A dental provider can check for dental or jaw causes. Other causes may require a doctor’s evaluation. 

Should I worry if the tingling comes back often? 

Repeat episodes are worth discussing with your Aspen Dental provider or doctor. Write down when the feeling starts, how long it lasts, what you were doing and whether you had any other symptoms. This information may help identify the cause. 

Can a soft lump in my mouth cause tingling too? 

A lump and tingling may or may not be related. If you notice a soft lump inside your cheek or lip, have an Aspen Dental provider examine it instead of assuming it is causing the sensation. 

Sources 

¹ National Institutes of Health, PubMed Central, Maxillofacial Plastic and Reconstructive Surgery: “Therapeutic modalities for iatrogenic late paresthesia in oral tissues innervated by mandibular branch of trigeminal nerve: a systematic review.” https://pmc.ncbi.nlm.nih.gov/articles/PMC11637152/ 

² American Dental Association, ADA Library and Archives: “Diabetes.” https://www.ada.org/resources/ada-library/oral-health-topics/diabetes 

³ American Academy of Allergy, Asthma & Immunology: “Oral Allergy Syndrome (OAS).” https://www.aaaai.org/tools-for-the-public/conditions-library/allergies/oral-allergy-syndrome-(oas) 

⁴ National Library of Medicine, MedlinePlus Medical Encyclopedia: “Hyperventilation.” https://medlineplus.gov/ency/article/003071.htm 

⁵ Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion, Division for Heart Disease and Stroke Prevention: “Signs and Symptoms of Stroke.” https://www.cdc.gov/stroke/signs-symptoms/index.html