The cause of pearl rash is not particularly clear, and is related to circumcision, local hygiene, and long-term stimulation of coronal secretions. The pearl rash is generally located at the coronal groove, around the glans appears light red papules, occurring in adults, mostly in patients with long foreskin, manifested as 1-3mm size of the papules, the two sides of the tie is larger, the papules do not fuse with each other, more densely arranged in a row, the dorsal side of the glans is more obvious, can be completely and partially around the glans, the color is pearly white, a few is light red, to human health It has no effect on human health and can be left untreated and does not require treatment. If you feel that it affects your appearance, you can do laser surgery to treat it.