Lying down after eating can make you fat. Food contains a lot of carbohydrates, proteins and fats, collectively known as the three major nutrients. Carbohydrates and other three nutrients are consumed to provide energy for the body. After eating and lying down, due to the lack of activity, the three major nutrients can not be consumed, will be converted to the body’s adipose tissue, resulting in fat. On the other hand, if you lie down after eating, the gastrointestinal peristalsis slows down, which is not conducive to digestion and absorption, and also easily lead to discomfort. After eating, patients need to appropriate activities, can consume carbohydrates, but also to promote the excretion of food, help prevent obesity, but also conducive to physical health.