What does this mean?
At the front of the tongue, touch and taste travel along very closely related pathways. So when one side of the tongue goes numb, taste on that same side can dull as well; most people describe this as food tasting only half of what it should. Because this pathway runs just on the inner side of the lower wisdom tooth, it is a known risk of surgery in that area.
The telling detail is the border. If the numbness stops sharply at the midline of the tongue and covers only one side, a single nerve is involved. Burning or tingling that covers both sides and is also felt at the tip of the tongue and in the lip points less to a nerve injury than to common causes such as blood levels, a dry mouth, oral thrush and burning mouth syndrome. The tongue looking normal from the outside does not change this distinction; loss of feeling cannot be seen.
How the numbness began also tells you something. Numbness that starts right after a procedure is explained by the nerve running through that area. Numbness that settles in quietly over weeks and has no link to any procedure calls for a separate assessment; it is not expected to clear up on its own.
Numbness on one side of the tongue can come from a nerve running through the area, but it can also come from a general condition affecting the whole mouth; the first two things your dentist looks at are the border of the numbness and when it started.
Likely causes
What helps at home?
- Be careful with hot food and drinks while the numbness lasts; one side of your tongue registers heat late and burns easily.
- Do not keep testing the feeling by rubbing your tongue against your teeth or biting it; repeating that injury can leave a sore in the area that takes a long time to heal.
- Write down whether taste is affected as well, which side it is on and how long it has been going on; these three details are used directly at the examination.
- Do not start vitamin or mineral supplements on your own before your blood is tested; doing so also makes a real deficiency harder to spot.
- If the numbness started after a procedure and has not eased at all within 24 hours
- If your tongue also moves less freely or your speech has become unclear
- If there is also a hardened lump, a sore that will not heal or a white or red patch on your tongue
- If the numbness is spreading to other parts of your face, to the lip or towards the jaw
- If you have difficulty swallowing or a one-sided sore throat comes with it
Frequently asked questions
- Is losing taste along with the numbness normal?
- Because touch and taste travel along closely related pathways at the front of the tongue, numbness on one side can be accompanied by dulled taste on that same side. That combination suggests the problem is not in the tongue itself but on the way to it. If loss of taste is on its own and covers both sides, a dry mouth, oral thrush and causes in the sinuses come to the fore.
- Can the tongue go numb after a wisdom tooth is taken out?
- The nerve that carries feeling in the tongue runs along the inner side of the lower wisdom teeth. Numbness, whether short-lived or longer-lasting, is therefore a known risk of surgery in that area and something to talk through before the procedure. How large the risk is depends on the position of the tooth and how close the roots sit to that nerve; the examination and the scans decide that.
- My tongue looks normal; can it still be numb?
- Yes. Loss of feeling does not change how the tongue looks; numbness can be there with no change at all in its colour or its surface. So the conclusion that nothing is wrong because nothing can be seen does not hold. The assessment relies less on appearance than on the border of the numb area and how you respond to touch.
This content is for general information and does not replace an in-person examination. Symptoms overlap between conditions, and a diagnosis can only be made clinically.