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What is the reason for oral numbness?

Disease analysis: suggestion: 2. Sudden numbness of limbs or one side of the face, numbness of the tongue and lips, or numbness of one side of the upper and lower limbs; Movement is ineffective, suddenly speaking unclear or unable to understand others' meaning; Corner of the mouth askew, drooling, dizziness, unstable standing or even fainting; Sleepiness and unexplained headache. This is a harbinger of a stroke. It is recommended to check cardiovascular and cerebrovascular diseases. 3. It is best to check the nerve injury in the early stage to see if it can be diagnosed clearly. Analysis of illness: Mouth numbness is mostly related to slow blood flow, increased blood viscosity, microcirculation changes, local blood supply insufficiency or cerebral blood supply insufficiency. Check whether blood lipid, blood sugar and blood pressure are elevated. Suggestion: