A smaller amount of food can be seen in normal circumstances, such as environmental factors, ageing, but also in pathological causes such as digestive diseases. 1. Environmental factors: When the temperature rises, the body’s basal metabolic rate will fluctuate lower, and will affect the secretion of digestive enzymes to reduce. When the body’s demand is low and gastrointestinal peristalsis is slowed down, the above symptoms will appear. 2. Ageing: As the function of the organs of the elderly gradually decline, coupled with reduced activity, the amount of food and digestive capacity will be reduced accordingly, and the above symptoms will also occur. 3. Digestive tract diseases: Digestive tract diseases will cause the feeling of stomach bloating, due to the feeling of stomach bloating and eat less food accordingly, eat a small amount of food will feel propped up. Whether it is normal to feel bloated after eating a small amount of food or not, it is recommended to go to the hospital to have the cause clarified by the doctor, and if it is due to a disease, it is necessary to have the doctor standardize the treatment in time.