The skin constantly renews itself thanks to fibroblasts, which regenerate the epidermis and dermis. These connective tissue cells help produce collagen, elastin, and hyaluronic acid—essential components that maintain skin hydration and structure.
However, when the skin is injured, this process is significantly affected. The healing process begins as the body releases pro-inflammatory cytokines that activate fibroblasts. These fibroblasts then produce much more collagen, leading to tissue remodeling at the injury site.
A scar forms over several months. Initially, it appears inflamed, with a red or pink color. After 6 to 12 months, it becomes whiter and takes on its final shape. However, the healing process can sometimes go awry, leading to irregular collagen regeneration and the formation of excess scar tissue on the skin.