Methylcobalamin does not treat thrombocytopenia. Methylcobalamin is a class of drugs used to treat peripheral neuropathy. Methylcobalamin is methylated vitamin B12, which is found in human blood and bone marrow, and is mainly used to nourish the nerves, and is generally used to treat peripheral nervous system disorders. Methylcobalamin application is more, commonly used to cause numbness, pain in the limbs, as well as itching, loss of sensation and other diseases, such as: diabetes-induced peripheral neuropathy, alcohol-induced peripheral neuropathy, and other kinds of neuritis, neuralgia. Thrombocytopenia should be timely to the regular hospital, by the doctor according to the specific conditions given the correct treatment, taking drugs should be taken under the guidance of a doctor.