What happens to long-term smokers once they quit smoking?

Frequent smokers will have a series of discomforts, such as irritability, dizziness, headache, insomnia and anxiety, coughing and sweating, decreased heart rate, increased appetite or weight gain. This is medically known as nicotine withdrawal syndrome, commonly known as smoking cessation syndrome. The occurrence of smoking cessation syndrome is due to the rapid decrease of nicotine intake during smoking cessation, which can not reach the level required by the brain. In the process of quitting smoking, whether taking drugs or not, smoking cessation syndrome may appear, and the higher the smoking age, the more obvious the performance of withdrawal syndrome when quitting smoking It should be noted that smoking cessation syndrome and adverse drug reactions may be difficult to distinguish in actual treatment. We should correctly understand the appearance of this symptom.