Due to poor eating habits, acute gastroenteritis often occurs, typically manifesting as pain in the posterior sternum, postprandial fullness and belching, upper abdominal pain, fever, severe vomiting, and other symptoms. Here are the specific manifestations:

1. Posterior Sternum Pain

There is a significant sense of pain in the posterior sternum, which can vary in severity. This is generally associated with conditions such as esophagitis, esophageal diverticulum, esophageal cancer, and other pathologies. All of these symptoms can be identified as early indicators.

2. Postprandial Fullness and Belching

Symptoms such as postprandial fullness, belching, loss of appetite, rapid weight loss, and pallor are often indicative of chronic gastroenteritis. Typically, these conditions can be managed through medication.

3. Upper Abdominal Pain

Significant upper abdominal pain, nausea, vomiting, indigestion, and other symptoms after eating, accompanied by recurrent upper abdominal pain, are typical signs of acute gastroenteritis. Relief can be achieved through the administration of relevant medications.

4. Body Fever

Symptoms such as abdominal pain, diarrhea, vomiting, and fever indicate gastroenteritis. Such cases require both medicinal treatment and rest for relief.

5. Severe Vomiting

Severe vomiting is a definitive indicator of gastroenteritis. However, if left untreated, it can lead to complications such as hypotension, hyponatremia, hypokalemia, and other conditions due to prolonged and severe vomiting. Therefore, it is imperative to seek medical treatment promptly.