Life Cycle. The life cycle of a louse begins as an egg, also called a nit. The nit is a 1mm whitish-yellow speck that attaches itself firmly to an individual hair strand close to the scalp.
Pityriasis rosea is a relatively common skin condition that causes a temporary skin rash of raised, red scaly patches on the body.The rash can be very itchy and usually clears within 2-12 weeks, but on rare occasions can last up to 5 months.ityriasis rosea is a relatively common skin condition that causes a temporary skin rash of raised, red scaly patches on the body.
Pityriasis rosea causes a rash. 1  The rash often begins with a single, round or oval, pink patch that is scaly with a raised border (herald patch). 2  The size of the patch ranges from 2 cm (0.8 in.) to 10 cm (3.9 in.) . 3  The larger patches are more common.he pityriasis rosea rash is similar to the rash seen in other skin conditions, including ringworm of the skin, tinea versicolor, eczema, and psoriasis.