If there are bumps under the glans, then the possible causes: 1. pearly papules of the penis, it is often seen in patients with long foreskin, prepuce, or who usually do not pay much attention to personal hygiene and have more local dirt. These factors can lead to the local appearance of papilla-like or granuloma-like bumps, generally not accompanied by any pain, nor with local rupture or bleeding, etc., can be long-term presence. As the disease progresses, the size and number of the lumps will further increase and further acetic acid tests or surgical excision will be required.