Here are 5 common digestive diseases with their symptoms and treatments: 1. Peptic ulcer disease - Symptoms include abdominal pain, nausea, vomiting, loss of appetite. Treatment includes medications to reduce stomach acid production and protect the lining of the stomach and intestines. 2. Gastroesophageal reflux disease (GERD) - Symptoms include heartburn, regurgitation of acid into the throat, chest pain. Treatment includes lifestyle changes and medications to reduce stomach acid. 3. Inflammatory bowel disease (IBD) - Includes Crohn's disease and ulcerative colitis. Symptoms include abdominal pain, diarrhea, weight loss. Treatment depends on severity but may include medications, surgery, dietary changes.