Oesophagitis, gastric ulcer, gastritis, gastric reflux, diarrhoea, duodenal ulcers, irritable bowel syndrome(IBS), Crohn’s disease, ulcerative colitis, gluten allergy, lactose intolerance, gastrointestinal polyps and diverticulosis and diverticulitis, gastrointestinal bleeding, haemorrhoid, gastrointestinal tumours and colorectal cancer are examples of gastrointestinal diseases.