Methylcobalamin is mainly used in the treatment of peripheral neuropathies and has no significant therapeutic effect on vegetative nerve disorders. Methylcobalamin is an endogenous coenzyme B12, which is involved in the cycling of one-carbon units, and is able to promote axonal regeneration, myelin sheath formation, and restoration of delayed neuroelectrical communication and neurotransmitter reduction. Adverse reactions to methylcobalamin include allergic reactions, abdominal pain, sweating, and other symptoms, and it is contraindicated for use in patients who are allergic to methylcobalamin. When using the drug, if there is no effect after 1 month of continuous use, there is no need to continue to use the drug, and people who work with mercury and its compounds for a long time should not take this product for a long time. The onset of phytosis should be adjusted daily habits, regular life and work. Oral glutamine and other drugs to regulate the nerves, while psychological dysfunction should be treated with psychological counseling. When the occurrence of plant nerve disorder, it is recommended to go to the hospital in time, and standardized treatment under the guidance of the doctor.