sting, in feeding or defense, leaving annoying itchy and painful welts.
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Scabies is commonly diagnosed as unspecified parasitic dermatitis. The problem is caused by mites in the genus Sarcoptes. These mites burrow into the skin and spend their entire life cycle in and on the skin. Lesions caused by scabies are very distinctive and tend to be concentrated on the web spaces of the hands and feed and in axillary and genital areas. Burrows can be identified, and scrapings will contain mites, eggs and feces. Itching caused by scabies is intense. Scabies is over-diagnosed. It is rare in most communities and tends to be encountered more frequently in indigent populations than elsewhere.
Hair follicle mites are a normal part of the human facial fauna. They live in hair follicles feeding on oily skin secretions. These mites cannot be felt and under normal conditions cause no symptoms. Individuals who wash infrequently and/or who have oily skin may develop large populations of these mites, which can lead to a dandruff-like condition in the eyebrows, eye lashes, beard and hairline.
