my mother is 68 years old , she had colitis , she had it under control but lost alot of weight from fear of getting sick , since january she has been fine. she also takes alot of medecine for her rhumetoid arthritis and blood pressure etc. this week we took her to the hospital she was pale and had diarreah and vomiting. her pottasium and magnesium was low, they gave it to her through intervenous but want to perform a eus. incase she has stomach cancer? she left hospital and is feeling a little better , eating and no diareah and no vomiting just lower abdominal pain after she eats. Any advice