These mites are largely parasitic and consume blood, skin and keratin. Dust mites, which feed mostly on dead skin and hair shed from humans instead of consuming them from the organism directly, evolved from these parasitic ancestors.
Hypertrophic scar (4 months after incident) A hypertrophic scar is a cutaneous condition characterized by deposits of excessive amounts of collagen which gives rise to a raised scar, but not to the degree observed with keloids. Like keloids, they form most often at the sites of pimples, body piercings, cuts and burns. They often contain nerves and blood vessels.
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.