In what phase of wound healing does scar tissue formation occur?

Scar tissue formation occurs during the maturation phase of wound healing. This phase, also known as the remodeling phase, typically starts about three weeks after injury and can last for months to years. During this time, collagen in the wound is remodeled, and the wound gradually gains strength and flexibility. The scar tissue, which is composed mainly of collagen, replaces the original tissue and may appear different in texture or color than the surrounding skin.

In contrast, the hemostasis phase is focused on stopping the bleeding; the inflammatory phase involves the body's response to injury and the cleaning of the wound; and the proliferative phase is characterized by the generation of new tissue, including new blood vessels and granulation tissue. Each of these earlier phases prepares the wound for the maturation phase, where the focus shifts to long-term healing and the development of scar tissue.