The symptoms of dizziness caused by smoking are common in several situations: 1. sympathetic excitement when smoking constricts the blood vessels in the brain, causing a lack of blood supply to the brain and symptoms of dizziness. 2. the process of smoking increases the platelet aggregation capacity, and when the platelet aggregates, it increases the blood viscosity, which increases the viscosity of the blood, leading to increased resistance to blood flow and slows down the blood flow. 3. the normal body needs to inhale oxygen, and inhaling large amounts of smoke can lead to a lack of oxygen to the brain and symptoms of dizziness. 3, the normal human body needs to inhale oxygen, and inhaling a large amount of smoke will lead to symptoms of lack of oxygen to the brain and dizziness. Therefore, smoking causes dizziness will cause the occurrence and development of atherosclerosis in the body, it is recommended that patients should avoid smoking, not to smoke, smoking is a chronic poisoning.