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).
A more comprehensive list of bowel obstruction symptoms include: 1  Pain or tenderness around or just below the belly button. 2  Stomach cramps that come and go. 3  Swelling or bloating of the stomach (distention)  Constipation and the inability to pass gas (sign of complete 1  blockage) Diarrhea (if bowel is partially blocked)  Nausea and vomiting.