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 starts with a single patch on your back or torso. Thatâs called the âherald patchâ or âmother patch.â Itâs usually oval and about 2 to 10 centimeters (a little less than an inch to almost 4 inches) in diameter. You may find it slightly raised or rough in texture.