The causes of poor stomach digestion are categorized into functional indigestion and organic indigestion. Functional dyspepsia may be caused by improper diet, such as overeating, eating too much greasy food, and less activity, which will lead to slow gastrointestinal peristalsis and poor digestion. It is also common in children and the elderly. Children have poorer digestion because their digestive ability is not yet perfect, and the elderly mainly have poorer digestion because their organs are aging. Organic dyspepsia is caused by diseases, mostly seen in acute and chronic gastric diseases, such as acute gastritis, chronic gastritis, gastric ulcer, etc., but also other diseases, such as liver disease, pancreatic disease, etc., which can also lead to poor stomach digestion. If the stomach digestive ability becomes poor if it is functional mainly to take conditioning, if it is caused by disease, need to cooperate with the doctor treatment, to avoid delaying the condition.