Numbness in the right hand in the morning may be caused by long-term local nerve compression due to maintaining a posture while sleeping at night, and generally does not require special treatment. Most patients may have cervical spondylosis and should have a cervical spine MRI to clarify the diagnosis if necessary. Patients may have hyperlipidemia, diabetes, hypertension, increased blood viscosity, one posture during sleep, slow blood flow rate, which may cause local ischemia and hypoxia, and hand numbness may also occur. Patients may be caused by cerebrovascular diseases, such as cerebral infarction, most of which develop at night during sleep can appear hand numbness, and may also show symptoms of limb weakness, and cranial CT or cranial MRI will be examined if necessary to clarify the diagnosis.