Suddenly quit smoking has an impact on the body, as follows: 1, withdrawal syndrome, usually smoking a relatively large amount, about 2 boxes per day, and smoking for a long time, more than 10 years, suddenly quit smoking will appear withdrawal syndrome, such as panic, palpitations, chest tightness, and some patients may be anterior heart area or back tingling, which is a manifestation of coronary syndrome, may appear mental, mental problems, such as anxiety, depression or the emergence of mental abnormalities, serious will hit people and destroy and other psychiatric symptoms, which is a withdrawal syndrome; 2, less smoking, about 10 cigarettes per day or within 1 box, Depression or mental abnormalities, and in serious cases, hitting and destroying things and other psychiatric symptoms, which are the more serious symptoms of withdrawal syndrome; 2, the amount of cigarettes is relatively small, about 10 a day or within 1 box, do not worry too much, you can just quit. The longer you smoke, the greater the damage to cardiovascular disease, causing atherosclerosis, and even plaque formation, the lungs and liver are affected, so you should quit smoking early.