There are many reasons for sudden numbness of lips, such as allergy, food stimulation, cerebrovascular disease, peripheral neuropathy and so on.
1. Allergy: contact with or use of allergenic substances may cause an allergic reaction, causing sudden numbness of the lips.
2. Food irritation: for example, taking chili peppers, cucumbers and other foods may cause transient symptoms of sudden numbness of the lips.
3. Cerebrovascular disease: for example, cerebral blood supply insufficiency, cerebral infarction, may lead to local nerve function abnormalities, causing sudden numbness of the lips.
4. Peripheral neuropathy: such as diabetes-induced neuropathy, or peripheral neuritis, etc., can lead to sudden numbness of the lips.
Sudden numbness of the lips, there may be other reasons, need to go to the hospital in time to check, clear cause.