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In chronic diarrhea there is no evidence of blood in the stool and there is no sign of infection. The condition may be related to irritable bowel syndrome. [1] There are various tests that can be performed to rule out other causes of diarrhea that don't fall under the chronic criteria, including blood test, colonoscopy, and even genetic testing.
Peptic ulcer disease; Infections, such as tuberculosis; and infiltrative diseases, such as amyloidosis. A rare cause of gastric outlet obstruction is blockage with a gallstone, also termed "Bouveret syndrome" or "Bouveret's syndrome". In children, congenital pyloric stenosis / congenital hypertrophic pyloric stenosis may be a cause.
These early symptoms can include diarrhea (which is often bloody), stomach cramps, mild fever, [10] or vomiting that results in dehydration and reduced urine. [9] HUS typically develops about 5–10 days after the first symptoms, but can take up to 3 weeks to manifest, and occurs at a time when the diarrhea is improving. [10]
Gastroenteritis, also known as infectious diarrhea, is an inflammation of the gastrointestinal tract including the stomach and intestine. [8] Symptoms may include diarrhea, vomiting, and abdominal pain. [1] Fever, lack of energy, and dehydration may also occur. [2] [3] This typically lasts less than two weeks. [8]
The strongest predictors of an upper gastrointestinal bleed are black stool, age <50 years, and blood urea nitrogen/creatinine ratio 30 or more. [8] [9] The diagnosis of upper gastrointestinal bleeding is assumed when hematemesis (vomiting of blood) is observed. [citation needed]
[1] [8] Endoscopy, a type of X-ray known as an upper gastrointestinal series, blood tests, and stool tests may help with diagnosis. [1] Other conditions with similar symptoms include inflammation of the pancreas, gallbladder problems, and peptic ulcer disease. [2] Prevention is by avoiding things that cause the disease.
In extreme cases, people may pass more than one liter of fluid per hour. More often, individuals will complain of diarrhea with blood, accompanied by extreme abdominal pain, rectal pain and a low-grade fever. Rapid weight loss and muscle aches sometimes also accompany dysentery, while nausea and vomiting are rare.
Other common symptoms that stomach disease might cause include indigestion or dyspepsia, vomiting, and in chronic disease, digestive problems leading to forms of malnutrition. [5]: 850–853 In addition to routine tests, an endoscopy might be used to examine or take a biopsy from the stomach. [5]: 848