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Symptoms of ileus include, but are not limited to: [citation needed] moderate to severe, diffuse abdominal pain; constipation; abdominal distension; nausea/vomiting, especially after meals; vomiting of bilious fluid (green or yellowish-green in colour) flatulence and/or lack of bowel movement; excessive belching
Fecal vomiting occurs when the bowel is obstructed for some reason, and intestinal contents cannot move normally. Peristaltic waves occur in an attempt to decompress the intestine, and the strong contractions of the intestinal muscles push the contents backwards through the pyloric sphincter into the stomach, where they are then vomited.
Nausea is a non-specific symptom, which means that it has many possible causes. Some common causes of nausea are gastroenteritis and other gastrointestinal disorders , food poisoning , motion sickness , dizziness , migraine , fainting , low blood sugar , anxiety , hyperthermia , dehydration and lack of sleep .
Many of the symptoms are due to malabsorption of nutrients due to the effects of bacteria which either metabolize nutrients or cause inflammation of the small bowel, impairing absorption. The symptoms of bacterial overgrowth include nausea, flatus, [5] constipation, [6] bloating, abdominal distension, abdominal pain or discomfort, diarrhea, [7 ...
In severe cases, where dehydration develops, intravenous fluid may be required. Antiemetics are sometimes necessary to suppress nausea and vomiting. Self-induced vomiting can be a component of an eating disorder such as bulimia nervosa , and is itself now classified as an eating disorder on its own, purging disorder .
High frequency of bowel movements, weight loss, nausea, fatigue, and fever are also common during disease flares. Chronic bleeding from the GI tract, chronic inflammation, and iron deficiency often leads to anemia , which can affect quality of life.