Dizziness after smoking is mainly caused by the lack of oxygen and insufficient oxygen supply to the body, this situation should reduce the amount of smoking to prevent damage to the body. Cigarette combustion may produce carbon monoxide, carbon monoxide into the human body, will be combined with the human hemoglobin, so that it loses the function of transporting oxygen, which will cause the body to supply insufficient oxygen, resulting in dizziness and other hypoxic manifestations of the body. Frequent smokers may suffer damage to the endothelial cells of their blood vessels, resulting in a decrease in the elasticity of blood vessels and other possibilities, leading to a slowing down of blood flow, which may also result in insufficient supply of blood and oxygen to the brain tissue, leading to dizziness. Cigarettes contain a large amount of nicotine and tar and other harmful substances, if the amount of smoking at a time is too large, the harmful substances into the body will lead to toxicity, there may also be dizziness. Smoking is most likely to damage the lung tissue, when the human lung tissue is damaged, the exchange of oxygen function may be reduced, so it may also lead to dizziness and other hypoxic reactions. Smoking has a great impact on the health of the organism, and patients are advised to quit smoking as soon as possible in order to improve their symptoms.