Generally speaking, eating less can’t make the stomach smaller, and eating too little for a long period of time will lead to insufficient secretion of gastric acid, atrophy of gastric mucous glands, indigestion, and affect your health. The stomach is a cystic organ with expansion and contraction functions, and its volume changes with the amount of food entering the stomach. When more food is eaten, the stomach will be relatively enlarged, and when less food is eaten, the stomach will be relatively reduced. However, in general, the capacity of the stomach is constant and there is no significant change in its volume, so eating less generally does not cause the stomach to shrink. In addition, eating too little for a long time will lead to no food stimulation in the stomach for a long time, resulting in reduced secretion of gastric acid, gastric mucosal glands atrophy, etc., affecting the digestion and absorption of food, resulting in indigestion, and eating too little will lead to insufficient nutrient intake, so that the organism lacks sufficient nutrients, malnutrition. It is important to note that frequent overeating can lead to long-term expansion of the stomach in the state, and in the long run will make the stomach bigger. Therefore, you should pay attention to develop good eating habits, eat small meals, avoid eating too little or overeating, while maintaining balanced nutrition.