The causes of a few dark patches on the glans are considered as follows: 1, seborrheic keratosis: mainly due to aging of the skin causing the appearance of restricted raised patches of skin. At this time, it is recommended that patients can go to the dermatology office and undergo carbon dioxide laser treatment. 2, Bowen-like papulosis: a viral skin disease caused by human papilloma virus, mainly on the glans appears dark brown dark spots, velvet-like, and will also fuse into plaques. It can be treated with topical interferon gel and also with liquid nitrogen freezing. Therefore, for black spots on the glans, it is recommended to go to a professional dermatologist at a regular hospital and conduct appropriate laboratory tests to guide the clinical treatment.