Feeling numbness in the hands can be seen in many diseases: 1. Clinically, the most common is brain disease. For sudden onset of hand numbness can generally be considered cerebrovascular disease, it is recommended to check the head CT to determine whether it is ischemic cerebrovascular disease or hemorrhagic cerebrovascular disease, and then give treatment for the cause. 2, feeling hand numbness can also be seen clinically in cervical spondylosis, due to the protrusion of cervical discs resulting in nerve root compression, the patient can appear hand numbness, generally in the morning or after a long period of ambulatory work, it is recommended that the patient can consult an orthopedic surgeon if necessary. If hand numbness occurs gradually along with headache and other symptoms, it can also be seen in intracranial occupational diseases, and it is recommended that the patient can check the head nuclear magnetic examination to confirm the diagnosis if necessary. 4, hand numbness can also be seen in peripheral neuropathy, especially in diabetic patients, due to unsatisfactory blood sugar control, the patient can have changes in peripheral nerve demyelination, which can 5, hand numbness can also be seen clinically in rare diseases, such as early spinal cord cavitation, patients can appear hand numbness, it is recommended to give the appropriate examination according to the accompanying symptoms.