Quitting smoking requires a certain amount of self-discipline, and the exact amount of time it takes varies from person to person, usually at least 3-12 months, or even longer. Tobacco contains nicotine and many other harmful ingredients that are detrimental to human health and can even lead to the development of malignant tumors, so it is recommended that people who smoke actively quit. However, nicotine is addictive and many smokers are unable to tolerate withdrawal symptoms in the process of quitting smoking, which leads to relapse and is the biggest reason for failure to quit smoking, and therefore also leads to repeatedly longer quitting times and even failure. For smokers with high self-discipline and a short smoking history, if they do not smoke for 3 months, they are generally considered to have successfully quit smoking, but there is still a possibility of relapse. Therefore, the time it takes to quit smoking varies from person to person, and it is difficult to predict by a uniform number. Patients are advised to be confident before quitting, have family members and friends supervise them together, and to divert their attention when withdrawal symptoms occur, such as getting high, listening to music, taking a walk, exercising, and staying away from people who smoke to avoid relapse; if necessary, seek help from a specialist.