Methylcobalamin may be effective for hand tremors in some patients, but it is not a cure for hand tremors in all patients. Hand tremor can be caused by a variety of reasons, such as hyperthyroidism, hepatic encephalopathy, Parkinson’s disease, peripheral neuropathy, etc. Methylcobalamin is only effective for hand tremor caused by peripheral neuropathy, and is not effective for hand tremor caused by the rest of the diseases. Methylcobalamin is an endogenous vitamin B12, which is easy to enter neuronal cells and has a better nutritional effect on neurons, so it can be used to treat hand tremor caused by peripheral neuropathy. Diabetes can lead to peripheral neuropathy, which can lead to hand tremors, and Guillain-Barré syndrome can also lead to hand tremors, for which methylcobalamin can be a good treatment. Hyperthyroidism is due to high metabolism leading to hand tremor; hepatic encephalopathy is due to elevated blood ammonia, which leads to central nervous system dysfunction, thus producing symptoms of hand tremor; Parkinson’s disease is due to the reduction of dopamine content in the brain, thus producing hand tremor. None of these tremors can be relieved by taking methylcobalamin. The causes of hand tremors are too varied to be generalized, and treatments need to be tailored to each individual. If you experience hand tremors, please consult a doctor to identify the cause and follow the doctor’s instructions.