Can stress cause stomach aches, reflux and diarrhoea? any answers appreciated!

Yes: Reflux is less likely but stress can certainly cause stomach aches and diarrhea. It should last for days on end but be more momentary. If you are ill for more than a few days see a physician.

It can.: So can other causes. Important to check with your doctor about why you have them. It could be serious. But back to the question, the gastrointestinal system has it's own 'nervous system' and can perceive your stress level and will react to it accordingly, Irritable Bowel Syndrome is highly associated to stress, and has symptoms similar to the ones you are describing.