Common digestive disorders include gastroesophageal reflux disease, cancer, irritable bowel syndrome, lactose intolerance, and hiatal hernia. The most common symptoms of digestive disorders include bleeding, bloating, constipation, diarrhea, heartburn, pain, nausea, and vomiting. Functional diseases are those in which the gastrointestinal tract looks normal when examined, but does not move properly. These are the most common problems affecting the gastrointestinal tract (including the colon and rectum).
Constipation, irritable bowel syndrome (IBS), nausea, food poisoning, gas, bloating, GERD, and diarrhea are common examples. Celiac disease, an autoimmune disorder, is a type of food intolerance. It causes digestive problems when you eat gluten (a protein in wheat, barley, and rye). People with celiac disease should follow a gluten-free diet to minimize symptoms and damage to the small intestine.