Numbness of the hands to eat methylcobalamin is generally about 14-28 days to see the effect, methylcobalamin on the nerve has a nutritional and restorative effect, if a month is ineffective, then you need to follow the doctor’s instructions to adjust the medication. Numbness of the hand may be caused by nerve compression or nerve lesions, common causes include cervical spondylosis, cervical stenosis, cervical disc herniation, peripheral neuropathy, cerebral infarction and so on. Mecobalamin is composed of vitamin B12, which has the function of supplementing vitamin B12 and nourishing nerves, and is clinically used for anemia and peripheral neuropathy caused by vitamin B12 deficiency. If the hand numbness is caused by peripheral neuropathy, the effect is usually seen in 14~28 days after taking this product, the specific effective time varies from person to person. If the hand numbness is caused by other reasons such as nerve compression, taking this product may not be effective. The causes of hand numbness are also central neuropathy, vascular disease, etc., when the use of methylcobalamin is also ineffective. Therefore, for patients with hand numbness, it is recommended to go to the hospital to find out the cause of hand numbness, and then according to the cause of treatment, should not be indiscriminate use of drugs, so as not to delay the condition.