Pearly rash, also referred to as pearly penile papules, is characterized in appearance mainly by the margins of the coronal canal. Small rounded papules appear with a smooth and shiny surface. The cause of pearly penile papules is unknown and may be related to localized friction of the prepuce. The color of the papules is transparent, or yellow, skin color, translucent color, etc., the size of 0.5 ~ 1 mm or so, the shape is round, the papules are not fused with each other, arranged along the coronal groove in a ring, the surface is smooth, the texture is hard, and there is usually no pain and itching sensation and symptoms. Pearl-like penile papules, generally do not need special treatment, usually pay attention to hygiene, avoid friction, prevent infection, if there are uncomfortable symptoms should be timely medical treatment, under the guidance of the doctor to choose the appropriate treatment.