Pearl Rash refers to penile pearly papules, and if you have red pimples on your penis you may have penile pearly papules. Pearl rash is known as penile pearly papules, is a common skin disease that occurs on the penis in young and middle-aged men, occurring in the male glans coronal groove edge of the tiny cone-shaped, arranged in a single row or multiple rows of white or reddish papules, not fusion, no self-awareness of the symptoms; Acetic Acid white test is negative. Pearl rash generally no discomfort symptoms, around the connection between the glans and the foreskin, the number of more, but slow-growing, usually can be no need to seek medical attention, if necessary, can choose circumcision, to reduce the possibility of harboring dirt. Red pimples may also be caused by other diseases, it is recommended to go to the hospital in a timely manner, to clarify the cause of the standardized treatment.