Feeling nauseous, drained of energy and bloated can all be symptoms of Crohn's disease, a chronic inflammatory disease of the bowel.
It primarily affects the small and large bowel, but can occur anywhere in the digestive tract.
The inflammation causes uncomfortable and bothersome symptoms and may result in serious damage to the digestive tract.
In the latest in the Ask the Doctor video series, Dr Frances Pitsilis shares everything you need to know about Crohn's disease.
For more from Dr Frances Pitsilis, visit her website here.
Always consult your GP or medical practitioner before embarking on changes to your health routine.