Gastrointestinal Endoscopy is a medical procedure that allows doctors to examine the inside of the digestive tract using a flexible tube called an endoscope. This tube has a light and camera at its tip, enabling the doctor to see images of the esophagus, stomach, and intestines on a monitor. It helps diagnose conditions like ulcers, inflammation, and tumors. During the procedure, patients may receive a sedative to help them relax. The endoscope is gently inserted through the mouth or rectum, depending on the area being examined. This minimally invasive technique can also be used to take biopsies or remove polyps, making it an essential tool in gastrointestinal health.