How is Crohn's disease and ulcerative colitis diagnosed?

How is Crohn’s disease and ulcerative colitis diagnosed? How is Crohn’s disease and ulcerative colitis diagnosed under the protection of the question? The answer may be necessary for a comprehensive medical examination and a series of additional tests to diagnose Crohn’s disease or ulcerative colitis. The doctor can perform a series of tests at the top of the upper digestive system to examine the small intestine. To perform this examination, drink the patient barium, a solution of thick powder ** that covers the small intestine walls, before performing the X -Ray photography. The doctor can also do a intestinal surface examination through X -endoscopy or sigmoidoscopy or colonoscopy. The doctor can also perform a biopsy, which involves taking a sample of the tissues from the intestinal walls that need to be examined under a microscope.