Those who do not have symptoms after quitting are at most psychologically dependent as well as patients with lung infections. Some people will experience withdrawal syndrome, such as chest pain, chest tightness, back pain, and colds, and the degree of withdrawal may vary from person to person. Some people have no discomfort, while others will experience discomfort such as chest pain, which cannot be generalized. Also, most patients who smoke will have a combination of airway problems or heart problems. If chest pain occurs after quitting smoking, patients are advised to go to a regular hospital for examination based on the characteristics of chest pain to rule out heart disease and lung disease. In fact, many young heart attack patients have only one risk factor, smoking, and no other risk factors. The patient suddenly develops chest pain, the doctor does an electrocardiogram to clearly diagnose the infarction, and treatment according to the infarction is sufficient. Chest pain and smoking cessation are not particularly closely related.