Initial tests for illnesses such as Coeliac Disease and Crohn's Disease involve blood tests and an endoscopy (normally a gastroscopy, where you are sedated and a small camera on a flexible wire is passed through the oesophegus and stomach, into the small intestine.
For most illnesses such as this, aversion to the foods that upset you is the only way to relieve symptoms but it is usually a life long commitment. IBS can be treated but it is a question of finding the appropriate medication to suit you.
The first thing to do, if it sounds as though you may have something along these lines is to speak to your doctor and s/he will arrange the necessary tests for you.
If you have had the sickness/temperature aspect, just make sure you drink plenty of fluids for now and don't eat any solid food until you are better. [ Vikki27's advice column | Ask Vikki27 A Question ]
Tulipg17 answered Friday May 26 2006, 8:07 am: This is typical of someone with Crohn's Disease, Colitis, or Inflammitory Bowl; but those diseases are accompanied by a lot of pain and other symptoms. If this has always been normal for you, there is no reason to worry. If not, and it doesn't correct itself in a few weeks, I would see a doctor. In the meantime, take Immodium, go easy on the fiber, and drink a lot of fluids to prevent dehydration. [ Tulipg17's advice column | Ask Tulipg17 A Question ]
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