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.
Sometimes the scar is hypertrophic, or thickened, but confined to the margin of the original wound. Hypertrophic scars tend to be redder and often regress spontaneously (a process which can take one year or more).reatment, such as injections of cortisone (steroids), can speed this process. Keloids, by contrast, may start sometime after a cutaneous injury and extend beyond the wound site. This tendency to migrate into surrounding areas that weren't injured originally distinguishes keloids from hypertrophic scars.