The bottleneck period of quitting smoking is also the most difficult time is the first three days, after 72 hours will enter the first month, that is, the physiological stage period. In the first month, the probability of people resuming smoking cigarettes is the highest, in this month will be looking for the stimulation of cigarettes, which will produce the physiological dependence of smoking cigarettes again, and after the 30th day of physiological dependence, will enter the psychological dependence period. The psychological dependence period will last for three months, during the psychological dependence period, there will be an involuntary physical desire to do smoking actions, then you can regulate the mind by certain exercises, such as engaging in outdoor sports, aerobics or listening to light music, relaxing the nerves, so it takes four months to quit smoking to be completely successful.