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.
What is pityriasis rosea? Pityriasis rosea is a harmless, common skin problem that causes a rash. Although it can occur at any age, it is seen most often in those between the ages of 10 and 35. See an illustration of pityriasis rosea.What causes pityriasis rosea? The cause of pityriasis rosea is unknown.