Peripheral neuritis, also known as polyneuropathy, is caused by different reasons, manifested as symmetrical or asymmetrical motor sensation at the distal ends of limbs and diseases with autonomic voice dysfunction. The common causes are: the first infection factor, such as influenza, measles, chickenpox, mumps, etc., and AIDS. Second metabolic and endocrine disorders, such as diabetes, uremia, gout, etc., can appear peripheral neuritis. The third nutritional disorder, vitamin B deficiency, such as B 12, chronic alcoholism, chronic diseases of gastrointestinal tract, etc. The fourth chemical factor, such as drugs furan drugs, such as furazolidone, isoniazid, phenytoin sodium and so on. The fifth infection and allergic reaction, such as Guillain-Barre syndrome, are injected with ganglioside after serum injection and vaccination. Sixth connective tissue diseases, such as systemic lupus erythematosus, rheumatoid arthritis, Sjogren's syndrome. Seventh heredity, hereditary ataxia, peroneal muscular atrophy, etc. When the patient is diagnosed with peripheral neuritis, the patient must actively cooperate with the doctor for treatment, so as to avoid the delay of the condition and the deterioration of the condition.