The main causes of dizziness in patients after smoking are as follows: 1. Patients experience dizziness in the case of heavy smoking, because heavy smoking can lead to spasms and abnormal constriction of blood vessels in the brain and cause a lack of blood supply to the brain, resulting in dizziness in patients. 2. After smoking, nicotine and nicotine in tobacco can cause stimulating effects on brain tissue, resulting in dizziness in patients who smoke. The symptoms of dizziness. This condition is seen in first-time smokers, and can even induce increased heart rate and arrhythmia, causing patients to have symptoms of panic. 3. Patients with symptoms of dizziness after smoking are considered to be caused by inadequate burning of tobacco. Because the smoke contains carbon monoxide, it will cause more carbon dioxide content in the blood, resulting in a decrease in the ability of hemoglobin to carry oxygen, causing insufficient oxygen supply to the brain tissue will also manifest as dizziness.