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 alba is a common skin disorder in children. The exact cause is unknown. However, it is thought that the condition may be associated with eczema, a common skin disorder that causes scaly, itchy rashes. People with pityriasis alba develop red, flaky patches on their skin that are round or oval in shape.eople with pityriasis alba experience round or oval patches of pale pink or red skin. The patches may appear on the following parts of the body: face (most common), upper arms, neck, and upper middle of the body.