Existing on the dorsal and lateral sides of the coronal sulcus, the lesions are white, skin color or light red translucent small papules, a single diameter of 1-3mm, translucent, shaped like a small pearl, with a smooth surface. Can be a few needle tip large fine pearl, this pearl-like along the glans coronal groove of the posterior edge of the glans arranged in a line or several lines, can be part or all around the glans called penile pearl rash. Pearl rash (Hirsuties papillaris genitalis), also known as pearly penile papules, coronal or glans papules, also known as hairy penis or polypapillary penis by some scholars.

Pearl rash is a benign condition, which in some cases lasts for a certain period of time and then subsides, while in others it can last for decades without change. Since the condition is not contagious and is not a health hazard, it does not need to be treated. However, prevention and care are important to prevent the condition from getting worse. If it is caused by prepuce, treat the prepuce as soon as possible; if it is stimulated by local secretions, wash the penis and perineum, change underwear and so on. It is recommended that you go to the hospital in time to confirm the diagnosis, and follow the doctor's instructions for treatment.