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).
In some cases, bowel cancer can stop digestive waste passing through the bowel. This is known as a bowel obstruction. Symptoms of a bowel obstruction can include: 1  severe abdominal pain, which may initially come and go. 2  not being able to pass stools when you go to the toilet. 3  noticeable swelling or bloating of the tummy.