Gastrointestinal (GI) diseases that affect various portions of the GI tract as well as digestive organs such as the liver, pancreas, and gallbladder. Some disorders that affect other areas of the gastrointestinal tract can show up in the mouth, either alone or in combination. GI diseases affect millions of people around the world and are a leading cause of morbidity and mortality. Diarrhoea, abdominal pain, abdominal distention, gastrointestinal haemorrhage, intestinal obstruction, malabsorption, or malnutrition are some of the most prevalent symptoms of gastrointestinal diseases. Irritable bowel syndrome affects 20% of the population, while dyspepsia affects 40%. Less than one third of patients seek help and support from a general practitioner for these issues, and anxiety of serious disease and cancer is just as crucial as symptom severity in determining whether or not to seek help.