Scars are not dangerous or life-threatening.
They can be itchy and painful, but more often are simply a cosmetic issue, so some people seek treatment to minimize the appearance of the scars.

A scar is a natural part of the wound healing process.
A scar is a mark which is left on the skin after a wound or injury of skin has healed.
When the skin is wounded, the tissues break, which causes collagen to be released.
Collagen builds up where the tissue is damaged, helping to heal and strengthen the wound. New collagen continues forming for several months and causes the scar to become red, raised and lumpy.
Scars cannot be removed completely, but it is possible to make them less visible and fade.
If scarring is unsightly, uncomfortable or restrictive, some treatments are available.