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.
The term hypertrophy means enlargement. Hypertrophic change in muscles is a positive adaptation to athletic training. Hypertrophic arthritic changes in the lumbar spine are also adaptive, but are not viewed in such a positive light. These changes are often associated with reduced mobility, pain and stiffness. Hypertrophic arthritic changes of the lumbar spine sometimes compress nerves and cause numbness and weakness in the legs.