There are many diseases that cause chest tightness and congestion after eating, commonly digestive diseases, in addition to intestinal flora imbalance, cardiovascular disease may also cause such symptoms. 1. Digestive system diseases: due to chronic gastritis, gastric ulcer and other digestive system diseases, so that the gastrointestinal function is weakened, the gastrointestinal tract peristalsis is insufficient, resulting in flatulence, indigestion and other symptoms, may be further aggravated after eating, resulting in the appearance of chest congestion after eating. 2. Imbalance of intestinal flora: As the body is unable to absorb and utilize the vitamins in the food as well as nutrients such as proteins, resulting in the metabolic reaction of the food residues with harmful bacteria such as methanogens, the gas produced forms a retention in the stomach, resulting in the occurrence of chest congestion. 3. Cardiovascular diseases: such as coronary heart disease, atherosclerosis and other cardiovascular diseases, due to the centralized distribution of blood flow in the digestive tract after eating, resulting in the relative insufficiency of coronary artery blood supply, aggravating the burden on the heart, resulting in patients with chest congestion, chest tightness, shortness of breath and other symptoms. It is recommended to go to the hospital in time, under the guidance of the doctor symptomatic treatment, pay attention to rest, avoid exertion.