After 1 to 30 days of quitting smoking, the body will experience withdrawal symptoms, weight gain, and relief of primary disease symptoms, etc. Each person who quits smoking may experience slightly different physical changes. After quitting smoking, the body will experience withdrawal symptoms, such as the desire to smoke, irritability, anger, lack of concentration, insomnia, fatigue, and hunger, which are the body’s normal state of self-regulation, and can occur a few hours after the start of quitting, and most often disappear within a month or so. In addition, the body is discharging respiratory secretions, there will be coughing, dry throat, runny nose symptoms. After quitting smoking, symptoms of hunger and a gradual return of appetite occur, so some people gradually gain weight. At this time, you can choose lower-calorie foods and increase exercise to control your weight. Smoking is a predisposing factor for many diseases such as chronic obstructive pulmonary disease, coronary heart disease, cerebral ischemia, etc. If these diseases exist, the symptoms of these diseases can be relieved after quitting smoking. Within 1 to 30 days of quitting smoking, each person’s physical changes occur at different times, and the degree of change varies, so it is recommended that you refer to the characteristics of changes in your own situation.