Dizziness may be caused by insufficient blood supply to the brain, cardiopulmonary diseases, anemia, etc. 1. Insufficient cerebral blood supply: commonly found in patients with basic diseases such as cerebral arteriosclerosis. When the movement is big, the blood flow required by the limbs will increase compared to when it is calm, and the supply of blood to the brain will be relatively reduced, and then the symptom of dizziness may occur. 2. Cardiopulmonary diseases: when suffering from coronary atherosclerotic heart disease, chronic obstructive pulmonary disease, etc., due to the decline in cardiopulmonary function, the action will lead to an increase in the oxygen demand of the organs, resulting in brain tissue hypoxia symptoms of dizziness. 3. Anemia: Anemia can lead to insufficient blood and oxygen supply to the brain, and dizziness may occur when the movement is too large. When the symptoms of dizziness occur when there is a big movement, it is recommended to consult a doctor in time to identify the cause and then targeted treatment to improve the symptoms.