Facial palsy is a disease that causes people to lose their face. Once suffering from facial palsy, patients will experience loss of forehead wrinkles, enlarged eye fissures, flat nasolabial folds, drooping corners of the mouth, and skewed corners of the mouth to the healthy side when showing teeth. Many patients lose their normal social life and work because of this disease, and knowing the causes of facial palsy can help prevent it. What are the causes of facial palsy? The main cause of facial palsy is due to the deficiency of the veins, wind and cold evil invading the facial Yangming and Shaoyang meridians, resulting in the blockage of the meridians, the loss of nourishment of the tendons, and the onset of sluggishness of the tendons and muscles. 2.Sleep The muscles and pores of the whole body are loose and open when sleeping. If the temperature of the air conditioner is turned on very low, or if it blows directly against the fan or air conditioner, the microcirculation of the body surface is stimulated by cold, and the blood vessels that locally nourish the nerves will spasm and become the cause of facial paralysis. 3, diet Too cold and too hot, or stimulating food, excessive vegetarian or do not eat staple food, vitamin deficiency, if the lack of vitamin B1 will cause the accumulation of lactic acid invasion of the brain, excessive eating seafood, eggs, milk, chocolate, poisoning the central nervous system, so that the ability of brain tissue to consume oxygen is weakened, so as to cause temporary spasm. Herpes simplex virus can be isolated from facial nerve biopsy specimens of facial palsy patients, immune complexes can be detected in the bulbar nerve, and the level of certain immunoglobulins in the serum is elevated, as well as the gadolinium enhancement MRI of this disease is the same as other viral diseases, so there is a viral infection caused by autoimmune diseases. Other rare traumas that can cause facial palsy include nasal ventilation injury, reactive neuroma, electric spark injury of welders, lightning injury, high-altitude palsy and diving disease, etc. These are all causes of facial palsy. These are the causes of facial palsy. 6.Cervical and facial diseases Tumors of the deep upper neck and parotid gland, surgery or facial trauma, deep neck abscess of otogenic origin, etc. In addition, in addition to congenital facial nerve malformation, facial palsy can also be caused by fetal malposition, facial compression, birth canal stenosis and forceps injury to the facial nerve. 7. Psychological aspects Investigation shows that psychological factors are one of the important factors triggering facial nerve palsy. There are many patients with facial palsy who have had bad mood or mental tension before. 8, Diseases within the temporal bone Acute and chronic otitis media, tuberculous otitis media, medical sources such as surgery, trauma-induced temporal bone fracture, Bell facial palsy, preauricular herpes zoster, malignant and benign tumors of the middle ear such as middle ear cancer, jugular vein bullae, facial nerve tumor, auditory nerve tumor, metastatic tumor, etc. The above is a brief introduction of what causes facial palsy. Experts point out that one should not be nervous when suffering from facial palsy and should go to a regular professional hospital for diagnosis and treatment in time.