White pimples on the foreskin may be caused by pearl rash, glans, warts and so on. 1. Pearl rash: white pimples appear on the foreskin, pinpoint or rice-like, no itching, pain symptoms, will not increase or become larger, this situation is generally pearl rash. 2. glansitis: this disease is mostly due to not pay attention to local hygiene and cleanliness caused by glans mucosal inflammation, can be manifested as a gradual increase in white pimples, can be accompanied by itching, pain and so on. 3. Condyloma acuminatum: white papules are mostly cauliflower-shaped and bleed easily when touched, and may also appear in the coronary groove in addition to the foreskin. To summarize, if there are white pimples on the foreskin, you should go to the men’s department or dermatology department of the hospital, to clarify the cause of the disease.