The first time you smoke, you get dizzy, mainly because you inhale a lot of nicotine and carbon monoxide during the smoking process, which causes the brain to lack oxygen and the symptoms of dizziness. In addition to dizziness, many people also have phlegm, cough and nausea, which are mainly due to the intake of nicotine during the smoking process. Nicotine can make people addicted to smoking, and as time goes on, the damage to the human body will gradually appear, such as lung disease, liver disease, and even gastritis. Therefore, it is recommended that smokers should quit smoking early. If you do not smoke, it is not recommended that teenagers, or even adults, smoke to relieve stress in their lives.