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 symptoms. Pityriasis rosea is a fairly common skin condition causing red raised scaly patches on the skin across the body. The rash can be severely itchy in many cases. Around half the people with pityriasis rosea will start to feel generally unwell a week to several days before the rash appears.