Stomach bloating, nausea and lack of energy can be caused by physiological reasons such as pregnancy or pathological reasons such as indigestion and acute gastroenteritis. 1. Physiological reasons: in the case of female patients, pregnancy triggers hormonal changes, resulting in bloating, nausea and lack of energy. 2. Pathologic causes: (1) dyspepsia: dyspepsia is accompanied by gastric digestive dysfunction and delayed emptying, so that food cannot be completely digested and absorbed, resulting in continuous fermentation and gas production in the stomach, which leads to bloating, nausea and lack of energy. (2) Acute gastroenteritis: unclean diet with bacteria and viruses will stimulate the gastrointestinal mucosa, resulting in gastrointestinal disorders, causing bloating and nausea. At the same time, it will stimulate the gastrointestinal tract abnormal peristalsis lead to diarrhea, and then appeared to have no energy. There may also be other reasons for stomach bloating and nausea, it is recommended to go to the hospital in time, under the guidance of the doctor to improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.