The numbness of the hands is related to diabetic peripheral neuropathy, central nervous system disease, cervical spondylosis and localized compression. 1. Diabetic peripheral neuropathy: diabetic patients with long-term poor control of blood glucose levels may lead to peripheral neuropathy, which in turn leads to a little numbness in the hands. 2. Central nervous system lesions: suffering from cerebral hemorrhage, cerebral infarction and other diseases may affect the normal physiological function of the brain, the patient may appear numbness of the hands and feet, limb movement disorders and so on. 3. Cervical spondylosis: patients with cervical spondylosis have herniated intervertebral discs that may compress the neurovascular system, resulting in numbness of the hands. 4. Localized compression: keeping the same posture for a long time may compress the blood vessels and nerves, which may also lead to numbness of the hands. Clinically there may be other reasons that can lead to a little numbness of the hands. It is recommended to go to the hospital as soon as possible in order to clarify the cause of the disease.