Dogs that are afflicted with ear mites will typically scratch at the ears excessively and shake their heads, even pulling out their own hair as they scratch. Some dogs will shake their heads so much that an hematoma of the ear will form (with blood pooling in the ear due to breakage of a blood vessel). Also a concern is when dogs will scratch at their ears to the point that damage is done to the ear canals or ear drums.
The hypertrophic scar is defined as a widened or unsightly scar that does not extend beyond the original boundaries of the wound. Unlike keloids, the hypertrophic scar reaches a certain size and subsequently stabilizes or regresses.
A hypertrophic scar is a red, raised scar that forms along a wound and can have the following characteristics for around two to five years: 1  it can restrict movement because scar tissue is not as flexible as the original skin. 2  it heals within the size of the original wound. 3  the healing tissue is thicker than usual.