The most common cause of small white dots on the male foreskin is sebaceous ectopic disorder. Sebaceous gland ectopia is due to a physiological variant of sebaceous gland development and sebaceous gland hyperplasia. The lips, oral mucosa, and external genital area are the preferred sites for sebaceous gland hyperplasia, which occurs mostly after puberty and is more common in middle-aged people, and is more common in men than in women. In male patients, it is mainly located in the external genital area, mostly in the penis, prepuce and tether, and rarely in the glans. The main symptom of sebaceous ectopia is a corn-like lesion on the skin with no visible elevation, usually in clusters, without obvious symptoms, and may not require treatment. Because treatment can be harmful, it may cause secondary bacterial or fungal infections. If you insist on treatment, you can have laser surgery.