There are many kinds of scars, and scar tumors can grow.

Scar tumor, also known as scar hyperplasia, is caused by excessive proliferation of fibrous connective tissue. The development is relatively slow, and most of them continue to increase. There are few cases of self-retraction, and occasionally there are malignant changes. Teenagers are in adolescence, with vigorous tissue growth, strong immune response after trauma and high skin tension, and are prone to scar hyperplasia.

Other common scars, if they are not cleaned in time because of unhealed wounds, mixed with colored substances or infected necrosis, generally will not grow up with development, but will gradually fade away.

The specific process varies from person to person.