A person who is experiencing changes in their bowel habits, diarrhea, constipation, abdominal pain such as gas pain or cramps, weight loss for no known cause, tiredness, blood in the stool or vomiting should go in to see their doctor, according to the Cancer Compass organization. These symptoms can often point to more serious colon problems such as Crohn's disease and colon cancer, according to the U.S. National Institute of Health and the Cancer Compass organization.
Crohn's disease may also include a fever symptom and can be diagnosed through blood tests and a physical examination. Doctors may also ask for stool samples. In some cases, the doctor will also need to perform a colonoscopy to rule out cancer. Colonoscopy tests are considered the best ways to diagnose the disease. Crohn's disease involves swelling and inflammation within the gastrointestinal tract, particularly the small intestine, according to the U.S. National Institutes of Health.
Colon cancer can be found through a variety of tests including a fecal occult blood test, a sigmoidoscopy, a colonoscopy and a double contrast barium enema according to the Cancer Compass organization. Colon cancer does not always show symptoms initially so patients experiencing unusual symptoms should see a doctor immediately as the disease may be in later stages. As always, it is best to treat cancer as quickly as possible to avoid the spread of the disease.