In which diseases is the disappearance of bowel sounds commonly seen?

　　Bowel sounds refer to the noises produced by the movement of gas and fluid within the intestinal lumen during intestinal peristalsis. Absence of bowel sounds is commonly seen in conditions such as gastroenteritis, appendicitis, colitis, intestinal obstruction, and acute peritonitis.

　　1. Gastroenteritis

　　Infection by pathogens causes damage to the gastrointestinal mucosa, triggering an inflammatory response. This may interfere with normal intestinal peristalsis, leading to absent bowel sounds, along with symptoms such as abdominal pain, bloating, and diarrhea.

　　2. Appendicitis

　　After invasion of the appendix by pathogens such as viruses or bacteria, inflammation stimulates the intestines, slowing intestinal motility. This results in diminished or absent bowel sounds, accompanied by severe abdominal pain, loss of appetite, and other symptoms.

　　3. Colitis

　　Inflammation of the colonic mucosa following infection may lead to intestinal adhesions, which can impair normal intestinal peristalsis, resulting in absent bowel sounds as well as symptoms like constipation and diarrhea.

　　4. Intestinal Obstruction

　　Intestinal spasms caused by various factors can inhibit intestinal motility. When peristalsis ceases, bowel sounds also disappear, accompanied by symptoms such as abdominal distension, abdominal pain, and cessation of flatus.

　　5. Acute Peritonitis

　　When the peritoneum is acutely infected by pathogens such as viruses or bacteria, the resulting inflammatory reaction produces large amounts of inflammatory substances that irritate the intestinal wall, causing paralysis and reduced intestinal motility. This leads to absent bowel sounds and symptoms including severe abdominal pain, bloating, and belching.

　　It is recommended to seek medical evaluation at a hospital and follow the doctor's instructions for appropriate treatment to prevent complications and protect health.