When people eat too much food, they will experience stomach distension, which in turn causes chest tightness symptoms. After eating a large amount of food, a large amount of food gathered in the stomach, the stomach will be dilated, the upward pressure can make the diaphragm located between the chest cavity and the abdominal cavity upward, affecting the respiratory, thus appearing chest tightness, belching and other uncomfortable symptoms. It should be noted that chest tightness can also be caused by heart or lung disease, if you still feel chest tightness after dietary adjustments, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor to avoid delays in the condition. It is recommended that people pay attention to a reasonable diet in daily life, eat small meals, avoid overeating, and go to the hospital immediately when discomfort occurs.