Gastroenterologists are doctors who are trained to diagnose and treat problems of the gastrointestinal (GI) tract and liver.
Investigations like X-rays, CT scan, blood test, stool examination, Motility test to see how food moves through the particular's digestive system etc are usually required.
A medical gastroenterlogist deals with the problems of gastrointestinal (GI) tract and liver by medicines whereas a surgical gastroenterlogist deals with the disorders surgically.
Typical symptoms include Rectal bleeding, Underwear stains, Bowel movement urges that are hard to control, Gas, Diarrhea, Stomach pain, Fatigue, Irritability, Weight loss, Itchy rashes and blisters.
If you are undergoing a gastroscopy, don't eat anything for 6 to 8 hours before the procedure, and stop drinking 2 to 3 hours before the procedure.