There will be certain changes in the body after quitting alcohol: first, changes in the digestive system, because prolonged alcohol abuse and drinking will cause certain stimulation to the mucous membrane of the liver and gastrointestinal tract, causing digestion and malabsorption. Therefore, after quitting alcohol, the digestive and absorption functions will be restored accordingly, so there will be no obvious pain in the liver area before quitting alcohol, or no clinical symptoms such as acid reflux and heartburn when waking up in the middle of the night, nausea, vomiting and acid vomiting in the gastrointestinal tract. There will also be changes in the digestive system after quitting alcohol, such as enhanced digestion and absorption, and a transient increase in body weight. Secondly, the circulatory system will change after quitting alcohol. Long-term alcohol abuse will cause certain adverse cardiovascular effects, resulting in symptoms such as chest tightness, shortness of breath and palpitations caused by coronary artery ischemia and spasm in the heart. Therefore, after quitting alcohol the circulatory system will have a heart rate that becomes normal, or the human body will not have obvious clinical changes of chest tightness and shortness of breath after exercise load. Third, the nervous system will experience a certain amount of nervous system hyperactivity after quitting alcohol, followed by normal sleep and rest.