Why do many people have crooked mouths?

Mouth deviation is a manifestation of facial paralysis, which can be divided into peripheral facial paralysis and central facial paralysis. Peripheral facial paralysis is mostly caused by facial neuritis, which is mainly caused by wind-cold factors, virus infection, excessive fatigue, autoimmune decline and so on. Central cerebral palsy is mostly caused by stroke, and the main cause of stroke is atherosclerosis.