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).
Symptoms of constipation include: 1  Fewer than three bowel movements per week. 2  Small, hard, dry stools that are difficult or painful to pass. 3  The need to strain excessively to have a bowel movement.  A feeling that your rectum is not empty after a bowel 1  movement. Frequent use of enemas, laxatives or suppositories.