Smoking cessation chest tightness and chest pain may be a symptom of withdrawal syndrome. However, the possibility of heart disease cannot be ruled out. If the symptoms persist, it is recommended that you seek medical attention in a timely manner. Cigarettes contain nicotine, nicotine is nicotine, on the central nervous system has a certain excitatory effect, often inhaled, the human body will produce a strong dependence on it, and thus addictive. During the period of smoking cessation, the level of nicotine in the blood decreases, and it is impossible to maintain the level of dependence needed in the body, resulting in a vegetative nervous disorder called withdrawal syndrome. Withdrawal syndrome is characterized by insomnia, chest pain, irritability, etc. Some patients also experience shortness of breath, chest tightness, etc. It mostly occurs in the first week to two weeks or so of quitting smoking. It is recommended that patients who experience these symptoms should use distraction, such as doing something else, choosing to eat healthy snacks, playing games, etc., all of which can relieve pain symptoms. For patients with persistent chest tightness and chest pain, it cannot be ruled out that there is a complication of heart disease. Previous smoking itself is a high-risk factor for cardiovascular disease, may be before quitting smoking, coronary artery atherosclerosis has occurred, due to myocardial ischemia, hypoxia and lead to chest tightness and chest pain. It is recommended to go to the hospital as soon as possible to clarify whether there is heart disease through chest radiographs, electrocardiograms and coronary angiograms.