Methylcobalamin tablets do not treat headache, methylcobalamin is mainly a kind of vitamin B12 supplements, mainly used in the treatment of neurological impairments, such as peripheral neuropathy caused by peripheral neuritis, commonly used methylcobalamin to treat. Headache can be caused by a variety of causes, commonly divided into functional headache and headache caused by organic lesions. Headache caused by organic lesions, such as a common cause, we consider the headache caused by increased intracranial pressure due to brain tumor. In addition, when the head MRI and other tests to rule out organic lesions, many headaches belong to the functional diseases, such as common migraine attacks, manifested as a fluctuating headache on one side. There are also common tension headaches, and some patients with fever will also show weakness, headache and so on. Therefore, when there is a disease, it is recommended to go to the doctor for a comprehensive diagnosis and treatment, and the rational application of drugs to control the symptoms.