How long it takes to quit smoking before there is no smoking addiction varies from person to person. Physiological smoking addiction usually disappears gradually in about 1-3 weeks, while the ensuing psychological smoking addiction has no fixed time point. Clinical studies have proved that within 24 hours after quitting smoking can produce physiological discomfort, such as craving for cigarettes, irritability, depression, difficulty in concentrating, restlessness, headache, lethargy, gastrointestinal dysfunction, which is a symptom of smoking addiction. This symptom is called to physiological smoking addiction, its disappearance time varies from person to person, in general normal circumstances is about 1-3 weeks on average. Physiological addiction will gradually disappear with the increase of quitting time, but it should be noted that after a considerable period of time the patient will appear psychological addiction, psychological addiction will not be like physiological addiction as the disappearance of the time nodes, the duration of its length of time and the length of time of smoking, the degree of dependence on tobacco and so on have a direct relationship. So how long it takes to quit smoking is different from person to person. In conclusion, the benefits of quitting are well known. For smokers who are not addicted or have a low level of tobacco dependence, they can quit gradually with perseverance, but often need to be given brief advice on quitting; for smokers with a high level of tobacco dependence and a strong withdrawal response, they often need to be given stronger interventions in order to finally quit successfully.