Crohn's disease causes inflammation in the small intestine colitis-collitis Crohn's disease usually occurs in the lower part of the small intestine, called the ileum, but it can affect any part of the digestive tract, from the mouth to the anus colitis-collitis The inflammation extends deep into the lining of the affected affected organ colitis-collitis The inflammation can cause pain and can make the intestines empty frequently, resulting in diarrhea colitis-collitis Crohn's disease is an inflammatory bowel disease (IBD) , the general name for diseases that cause inflammation in the intestines colitis-collitis Crohn's disease can be difficult to diagnose because its symptoms are are similar to other intestinal disorders such as irritable bowel syndrome and to another type of IBD called ulcerative colitis colitis-collitis Ulcerative colitis causes inflammation and ulcers in the top layer of the lining of the large intestine colitis-collitis Crohn's disease may also be called ileitis or enteritis colitis-collitis Diarrhea and and crampy abdominal pain are often relieved when the inflammation subsides, but additional medication may also be necessary colitis-collitis Several antidiarrheal agents could be used, including diphenoxylate, loperamide, and codeine colitis-collitis Patients who are dehydrated because of diarrhea will be treated with fluids and electrolytes colitis-collitis Drug Therapy Drugs that suppress suppress the immune system are also used to treat Crohn's disease colitis-collitis Most commonly prescribed are 6-mercaptopurine and a related drug, azathioprine colitis-collitis Immunosuppressive agents work by blocking the immune reaction that contributes to inflammation colitis-collitis These drugs may cause side effects like nausea, vomiting, and diarrhea and may lower a a person's resistance to infection colitis-collitis When patients are treated with a combination of corticosteroids and immunosuppressive drugs, the dose of corticosteriods can eventually be lowered colitis-collitis Some studies suggest that immunosuppressive drugs may enhance the effectiveness of corticosteroids colitis-collitis How is Crohn's disease diagnosed? If these tests show Crohn's disease, | 