Extremely low blood pressure can develop in seconds (as with bleeding from trauma), in minutes (as with a peanut allergy), or over the course of hours (as with a worsening infection, such as toxic shock syndrome).
Eventually the contents start backing up.â. Here are the most common bowel obstruction symptoms: 1  Distended (swollen or bloated) abdomen. 2  Nausea. 3  Vomiting â color and texture of vomit may help diagnose the obstruction. 4  Change in bowel habits. 5  Constipation. 6  Very thin stools. 7  Blood in the stool, especially likely if cancer is a cause.
Blockage in the small intestine causes intense episodes of abdominal pain and vomiting that may lead to dehydration and shock. Symptoms (intractable constipation and pain) develop more slowly in large-bowel (colon) obstruction. Blockage of the small intestine is much more common than blockage of the large intestine. A partial blockage that allows only liquid to pass can result in diarrhea.