Scars are a sign that nature is working at protecting us. When cell tissue gets wounded the adjacent areas of skin get working to heal the injury. Specialised cells, called fibroblasts, produce bundles of fibrous connective tissue made up of collagen to reconnect the tissue. These bundles of whitish, relatively inelastic fibres appear on the surface as a scar after the healing process has completed itself.
The deeper the wound, the greater the chances of a scar. During the process of healing, the skin creates a scab which protects the wound from germs. When the wound is healed the scab dries up and falls off, sometimes leaving behind a pale pink, brown, or silver scar, and some indentations in the skin.

These are several different types of scars including:

• Keloid scars. These scars are the result of an overly aggressive healing process.
• Contracture scars. If your skin has been burned, you may have a contracture scar.
• Hypertrophic scars.
• Acne scars