Symptoms of food retention mainly manifest as abdominal distension, abdominal pain, anorexia, vomiting, belching (burping), acid reflux and so on. 1. Bloating and abdominal pain: mainly caused by overeating, eating indigestible, greasy and cold foods. As this kind of food increases the digestive burden of the gastrointestinal tract and accumulates in the gastrointestinal tract, bloating and abdominal pain will easily occur. 2. Vomiting, anorexia: due to eating too much, resulting in the retention of food in the gastrointestinal tract, causing gastrointestinal tract dysfunction, resulting in anorexia, nausea, and in severe cases, vomiting symptoms. 3. Belching: As a large amount of food is retained in the gastrointestinal tract, a large amount of gas is discharged from the mouth during digestion, resulting in belching (hiccups). 4. Acid reflux: As a result of eating too much, the burden on the stomach and intestines is increased, and it is not easy to digest the food, leading to the fermentation of the remaining sugar in the gastrointestinal tract, which induces acid reflux. It is recommended that patients with the above symptoms should consult a doctor in time and take standardized treatment under the guidance of the doctor.