If there are small white spots on the edge of the glans, then the possible causes: a. pearly papules of the penis, which can be distributed on the edge of the glans coronal groove, or on both sides of the foreskin tether, manifesting as white granulation-like protrusions or papilla-like protrusions, with no surface discharge, clean, dry, no bleeding, no local pain, can exist for a long time. Most of them are formed because the foreskin is too long or circumcised and wrapped around this area for a long time. No special treatment is needed and it is not infectious. For patients who are circumcised or circumcised, circumcision can be considered. The local attached foreskin scale, this part is wrapped by the foreskin for a long time, may accumulate some foreskin scale, or urine after urination is not dried in time, the local may remain a little urine scale, attached to the edge of the glans coronal groove, manifested as white patches or white spots, etc.. Use cotton swabs to remove, local with obvious odor, after cleaning the white spots disappear.