There are three phases to the wound repair process:
Phase I: Inflammation. Piercing the skin triggers your immune system to disinfect the wounds, remove debris, increase blood flow and begin to create new tissue.
Phase II: Proliferation. The wound is re-built with new granulation cells, as well as a temporary (type III) collagen and elastin, which are part of the extracellular matrix. Additionally, a new network of blood vessels develops.
Phase III: Remodeling. The wound has been replaced with new dermal tissues and blood vessels. The type III collagen in the newly formed tissue is replaced with stronger type I collagen, which can contract to create a tightening or “shrink wrap” effect on the skin.