Eating a little bit of food to feel full may be due to physiological factors, such as eating and swallowing too much air, etc.; as well as pathological factors, such as indigestion, gastritis, etc.. 1. Physiological factors: such as mental tension, eating and swallowing too much air. When eating, eating too fast and too fast and talking during meals will swallow a lot of air, the air occupies part of the space in the stomach, and there will be a little bit of food to feel full. 2. Pathological factors (1) Indigestion: the decrease of digestive enzymes and gastric acid leads to the food can not be well digested and decomposed, which exceeds the stomach’s digestive capacity and sends a signal to the brain to reduce the food intake, causing the feeling of fullness after eating a little bit of food. (2) Gastritis: Inflammation in the stomach, during the eating process, a large amount of gastric acid is secreted, which stimulates the intestines and stomach, resulting in stomach pain or irregular contraction of the stomach, causing the feeling of fullness after eating a little meal. There may be other reasons for feeling full after eating a little meal, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.