Endoscopy is a medical procedure that allows doctors to examine the inside of a patient's body using a flexible tube with a light and camera, called an endoscope. This tool is inserted through natural openings, such as the mouth or rectum, or through small incisions, enabling visualization of organs like the esophagus, stomach, and intestines. During an endoscopy, doctors can diagnose conditions, take tissue samples, and even perform minor surgeries. The procedure is typically done under sedation to ensure patient comfort. Endoscopy is a valuable tool for detecting issues early and guiding treatment decisions.