Pearl rash refers to pearly penile papules, after circumcision pearly penile papules especially related to the circumcision, personal hygiene, local irritation and other reasons. 1. circumcision: because when the foreskin is too long, it will make the foreskin scale gather together, thus increasing the risk of pearly penile papules. The reason why after circumcision pearly penile papules especially, mainly because after the circumcision only found the existence of pearly penile papules, and before the operation due to the foreskin is too long, so do not think it is especially much. 2. Personal hygiene: if the patient after circumcision still do not pay attention to penile hygiene, long time not clean the affected area, then it will aggravate the pearly penile papules, resulting in an increase in the number of lesions. 3. Local stimulation: Secondly, it may also be because the patient often masturbate after surgery, the penis localization caused by excessive stimulation, will also induce the onset of pearly penile papules. It is recommended that the circumcision of the pearl penis papules particularly more patients to the hospital, clear specific reasons.