Lip numbness and tongue tip numbness are commonly caused by cerebrovascular diseases, side effects of some drugs and dietary factors. 1. Cerebrovascular disease: clinically common such diseases are cerebral infarction, cerebral hemorrhage, etc., the sick people in the acute onset of the state will appear facial paralysis, tongue and lip numbness, numbness of the limbs and other symptoms, and in severe cases, hemiplegia will also occur. It is recommended that these people should seek medical treatment in time to avoid serious damage to their body functions. 2. Side effects of some drugs: clinically, there are common side effects of streptomycin, etc. Some people will experience peripheral nerve damage after using the drug, such as numbness of the face or limbs, pins and needles, and other peripheral neuritis symptoms. 3. Dietary factors: If some people eat too much spicy and stimulating, too hot food during the meal, it may cause irritation to the lips and tongue, which may lead to numbness in the relevant parts of the body. It is recommended that people in this group should eat a sensible diet and avoid bad eating habits. If the symptoms persist, it is recommended to seek neurosurgical treatment as soon as possible.