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).
The symptoms of a bowel obstruction are. 1  Feeling bloated and full. 2  Pain (usually colicky tummy pain). 3  Feeling sick. 4  Vomiting large amounts (including undigested food or bowel fluid).
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.