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 and Your Skin. Pityriasis rosea is a common skin rash that usually is mild. The condition often begins with a large, scaly, pink patch of skin on the chest or back. The patch usually is followed by additional pink patches of skin. There is itching and redness or inflammation of the skin. The number and sizes of the spots can vary.