This document provides an overview of wound healing, its functions, stages, mechanisms, factors affecting it, and complications. A wound is a break in the integrity of the skin or tissues, which may be associated with disruption of the structure and function. Healing is the body’s response to injury in an attempt to restore normal structure and functions. Healing can occur in two ways: Regeneration and Repair There are 4 phases of wound healing: hemostasis, inflammation, proliferation, and remodeling. This document also describes the mechanism of wound healing. Factors that affect healing include infection, uncontrolled diabetes, poor nutrition, age, anemia, the presence of foreign bodies, etc. Complications of wound healing like infection, hyperpigmentation of scar, contractures, and keloid formation.