White dots on the foreskin may be caused by diseases such as glans phimosis, sebaceous ectasia, and pearly rash. 1. glans penis: glans penis leads to white dots on the foreskin of the patient is mainly due to the infection of pathogens caused by the emergence of glans penis after the emergence of glans penis inflammation patient glans localization may have edema, pain, but also accompanied by discharge, pus manifestation. 2. Sebaceous ectasia: Sebaceous ectasia is mainly caused by endocrine stimulation or local trauma, and the disease usually appears in the oral mucosa, near the genitals. After sebaceous ectasia occurs, there may be flat-like small herpes, superfluous organisms, which can be realized as white dots. 3. Pearl rash: after the appearance of pearl rash, the patient will also have white dots on the foreskin, mainly because of the local stimulation of the foreskin is too long. After the appearance of pearl rash patients may have light red or white papules near the genital organs, but will not be accompanied by itching. In summary, many reasons can lead to white dots on the foreskin. In daily life, patients need to pay more attention to private hygiene to avoid aggravating the symptoms of the disease.