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.
As these symptoms go away, the first patch of pityriasis rosea is seen on the skin. This can be up to 10 cm across and is known as the herald patch. This usually appears on the abdomen, chest or neck, but can affect the face, scalp or genital area. Some days to two weeks later a secondary rash appears.