When a person first quits smoking, there will be many obvious physical symptoms of maladjustment, as follows: 1. The digestive system will experience a series of digestive and absorption disorders, such as abdominal distention, abdominal pain, nausea, acid reflux, heartburn, and even constipation, which are all stages of quitting smoking. 2. The circulatory system will experience paroxysmal tachycardia, arrhythmias, and occasionally chest tightness, shortness of breath, palpitations, and precordial discomfort. In the respiratory system, there will be reflex choking and coughing, and even transient dyspnea. 4. In the nervous system, there will be anxiety, agitation, irritability, irritability, and irritability, or there will be plant nerve dysfunction during rest and sleep, all of which are part of the physical discomfort of quitting smoking.