Peripheral neuritis refers to sudden onset peripheral neuritis. The clinical symptoms of patients are mainly sensory disturbances, usually abnormal sensation in the distal limbs, such as pins and needles, migrating sensation or burning sensation, abdominal pain, etc. Patients may have symmetrical sensory loss or absence in the distal limbs, usually in a glove or garter-like distribution, and some patients may also have autonomic nerve Some patients also have autonomic dysfunction, which is characterized by symmetrical pallor, bruising, and lack of sweating of the skin at the end of the limb, as well as rough, brittle, or even ulcerated nails. The treatment of peripheral neuritis is mainly symptomatic and cause-specific. Symptomatic treatment is to give the patient nerve-nourishing drugs, such as methylcobalamin, adenosine cobalamin, epalrestat, and lipoic acid. For example, if the patient is poisoned by isoniazid, the drug should be stopped immediately. If it is lead poisoning, immediately remove from the poisoned environment to stop the poison from continuing to enter the body. If it is caused by diabetes mellitus, strictly control the blood sugar and slow down the progress of the disease.