Gastrointestinal treatment promotes good health of the digestive system or gastrointestinal (GI) tract. Gastrointestinal diseases affect the health of your digestive system & how well the body digests food. Some common types of GI diseases are gastroesophageal reflux disease (GERD), heartburn, ulcers, piles, irritable bowel syndrome, gastritis, chronic diarrhoea & constipation, etc.