Numbness of the hands may be the cause of cervical spondylosis, cerebrovascular disease, neuritis and the early manifestation and sign of carpal tunnel syndrome. 1. Cervical spondylosis: The main manifestation of neurogenic cervical spondylosis is numbness in the arms and fingers. Because some of the major nerves in the hand travel from the cervical vertebrae through the joints and limbs to the palm of the hand, you may feel numbness in your hand no matter where the nerves are compressed. Sometimes sleeping position is not correct, resulting in falling pillow or pillow is too high may lead to hand numbness. 2. Cerebrovascular disease: such as cerebral hemorrhage, cerebral infarction patients are also prone to finger numbness and weakness, and will be accompanied by limb weakness, dizziness, headache and other symptoms. This is caused by ischemia of the blood vessels supplying hand movement and damage to the nerves. 3. Neuritis: generally refers to inflammation of the peripheral nerves, which may be caused by various reasons. For example, nerve inflammation caused by trauma, infection, poisoning, and local compression may cause demyelination of nerve fibers and axonal degeneration. The main manifestations are limb pain, hand numbness, and in severe cases, it may cause motor dysfunction of the limbs, and even cause paralysis of respiratory muscles. 4. Carpal tunnel syndrome: due to the long-term grip on the mouse so that the nerve is compressed, resulting in carpal tunnel stenosis symptoms of hand numbness. Patients with hand numbness, it is recommended to go to a professional hospital as soon as possible for further diagnosis and treatment, so as not to delay the condition.