Stomach discomfort, lack of energy and fatigue are generally considered to be caused by gastrointestinal colds, gastroenteritis and indigestion. 1. Gastrointestinal cold: it is a kind of intestinal dysfunction disease, often accompanied by abdominal pain and diarrhea, fever, headache, nausea and other symptoms, due to diarrhea caused by the body’s lack of energy, which can lead to lack of energy, fatigue. 2. Acute gastroenteritis: when the patient has severe diarrhea, vomiting, abdominal pain and other symptoms, it is considered to be caused by acute gastroenteritis, the common cause may be caused by eating spoiled or unclean food and water. 3. Indigestion: When eating too greasy, cold and indigestible food, the accumulation of food in the gastrointestinal tract and its indigestion will cause stomach discomfort, resulting in weakness and lack of energy. Stomach discomfort and lack of energy may also be related to other causes, it is recommended to go to the hospital in a timely manner to improve the examination, under the guidance of a professional physician to clarify the cause of the disease, and to give targeted treatment or therapy.