The causes of tongue numbness and bitterness may be caused by food stimulation, tongue nerve damage, insufficient blood supply, tongue inflammation and other factors. 1. Food stimulation: If you consume too many peppercorns, vinegar peppers and other stimulating foods in a short period of time in your daily diet, it may lead to tongue stimulation and numbness and bitterness, which is a normal physiological phenomenon and can be relieved on its own. 2. Lingual nerve injury: the lingual nerve mainly innervates the sense of taste in the front 2/3 of the tongue, if the lingual nerve is injured due to trauma, tooth extraction and other accidental injuries, it may lead to numbness of the tongue, and due to the dysfunction of the sense of taste and the feeling of tongue bitterness, in this case, you can choose to take methylcobalamin tablets, as well as vitamin B2 tablets and other medicines to nourish the nerves. 3. Insufficient cerebral blood supply: clinically, due to hypertension, hyperlipidemia and other diseases lead to insufficient cerebral arterial blood supply, may also cause the tongue to appear insufficient blood supply and lead to numbness and bitterness of the phenomenon, the need to timely use of nifedipine and other medicines to control blood pressure, and appropriate to take blood vessel medication to regulate. 4. Tongue inflammation: Tongue inflammation patients with tongue tip section and tongue side edge common superficial ulcers, patients feel tongue numbness, burning pain, taste sensitivity, need to go to the hospital stomatology department to actively cooperate with the cause of the search and then symptomatic treatment, and the need to supplement the full amount of B vitamins. The above drugs need to be used under the guidance of a doctor.