People who have suffered from gastroenteritis for a long time are likely to lose weight. Because gastroenteritis will be manifested as indigestion, abdominal pain, acid reflux, belching, early satiety, and there may also be changes in stools, such as diarrhea, increased frequency of stools, and so on, the food eaten at this time will not be conducive to digestion and absorption. Some patients may have poor appetite, eat very little, and will suffer from malnutrition and wasting. There are also a small number of patients who suffer from acute gastroenteritis or chronic gastroenteritis, because of too much tension, anxiety, insomnia may occur, but also because of eating too little, too much mental stress and lead to wasting. It is recommended that patients with gastroenteritis, the need for formal cooperation with specialists to give examination and treatment, can improve the electronic gastroscopy plus electronic colonoscopy, specific understanding of the gastrointestinal mucosal lesions, and then according to the doctor’s guidance to give the use of specific drug therapy.