When should you see a gastroenterologist? Ongoing Diarrhea - From food to infection to certain medications, many things can bring on a bout of diarrhea... Constipation... Sudden or Severe abdominal pain... Frequent or Severe heartburn... Rectal bleeding or Blood in stool... Feeling unusually bloated... You're due for a Colonoscopy... To know more details visit our website - https://www.skedoc.com/hyderabad/gastroenterologist