Gastrointestinal (G.I.T) diseases affect the digestive system, including the stomach, intestines, and associated organs. Common conditions include cholelithiasis (gallstones), gastritis (stomach inflammation), gastric tumors, irritable bowel syndrome (IBS) causing bowel dysfunction, gastric ulcers due to stomach lining erosion, and pancreatitis, the inflammation of the pancreas. These conditions may arise from infections, lifestyle factors, dietary habits, or underlying medical issues. Symptoms like abdominal pain, bloating, or altered bowel habits are common, requiring treatment ranging from dietary management to surgery.