An operation is a medical procedure performed to diagnose, treat, or manage a health condition. It often involves cutting into the body to remove, repair, or replace tissues or organs. Operations can be classified as either major or minor, depending on their complexity and the risks involved. Common types of operations include surgery for appendicitis or knee replacement. Before an operation, patients typically undergo assessments to ensure they are fit for the procedure. Anesthesia is usually administered to manage pain during the operation. Post-operative care is essential for recovery, which may include monitoring for complications and providing rehabilitation as needed.