Insufficient blood supply to the brain and weakness of the limbs are not closely related. Insufficient blood supply to the brain occurs when one limb, including the upper and lower limbs, the face or one limb on one side, has sensory or motor impairment, weakness, etc., determined by the conduction path of the nervous system, and weakness of all four limbs should be thought of other diseases. Patients with long-term chronic wasting diseases, such as tumor patients, patients with various causes of anemia, patients with weak constitution due to diseases or patients who are bedridden due to stroke diseases, will have weakness of limbs. Normal people can also have weakness in the limbs, people who stay up late for a long time and lack exercise can also have weakness in the limbs, and do not have insufficient blood supply to the brain, patients with low blood potassium and low blood sodium can also have weakness in the limbs, patients with insufficient blood supply to the brain and weakness in the limbs do not exclude the appearance of cervical spine diseases, and it is recommended to go to the hospital for treatment. If there is insufficient blood supply or weakness in the limbs caused by the cervical spine, it can be treated with massage, physiotherapy and acupuncture.