Tobacco addiction is easy to become addicted to, and it is very difficult to quit, which is medically called tobacco dependence and is a chronic disease. People with tobacco dependence have to quit smoking, and it is easy to develop a smoking cessation syndrome, also called nicotine withdrawal syndrome. The manifestation of smoking cessation syndrome is multifaceted, mainly the following manifestations: First, physiological, early manifestations are cough, thirst, drowsiness, hard stools, etc.. In the later stage, it can be manifested as dizziness, headache, general weakness, increased appetite and insomnia, etc. In severe cases, hand tremors, nausea, vomiting, decreased appetite, etc. Second, psychological aspects, depressed mood, depression, difficulty in concentration, excessive depression, loss of interest in things, etc. In serious cases, there may be suicidal and self-harm tendencies.