There is a circle of small particles at the root of the glans, possible causes: 1. pearly papules of the penis, which are found in the coronal groove of the glans, distributed in a circular pattern, or on both sides of the prepuce tether. They appear as soft papillae or granuloma-like structures, size and number of volume, and can remain unchanged for a long time. There is no surface discharge, no pain when touched, no bleeding, and it may be related to factors such as overcircumcision or circumcision, and generally no treatment is needed. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. 2, acne is the result of the human papillomavirus through unclean sexual contact. Local excision and pathological examination are required to confirm the diagnosis.