What causes a fluctuation in blood pressure?
Patient: Last week I fasted 18 hrs for a routine blood draw. Routine exam of heart, lungs were normal. Next day I ate half a bag of nuts prior to popcorn. The next morning there the bowel movement was like sludge and there was red flood in the water. None since and stools are normal. However, my blood pressure has been very low - like 94 over 58 probably being the lowest - and sometimes it is normal - like 115 over 76. I feel fine, no aches or pains....just tired. I would appreciate your opinion. Thank you Doctor: see the blood pressure is not a fixed thing that will not be same everyday and it will not be same the whole day ...blood pressure depends upon the food type taken as some as coffee may  increase BP  and it may fall after loose motions ..some herbal supplements may cause BP to fluctuate ...