Raised black nevus on penis can be caused by nevus nigra, hemangioma hemorrhoid, wart-like nevus and other factors. 1. Dark pigmented nevus: often caused by factors such as slow alternation of new and old keratin, the diameter is usually not more than 1cm, if there is no obvious change in the long term, no enlargement, rupture and other manifestations, it is considered to be a benign lesion. 2. Vascular nevus tumor: congenital vascular malformation and congenital benign tumor in soft tissue or skin formed by proliferation of vascular cells during embryonic period, which can appear the performance of raised nevus on penis. 3. Warty nevus: usually caused by their own genetic mutation or hereditary factors, the typical symptom is the appearance of brownish-black warty papules, which can occur in the penis, appearing to grow raised nevus. The raised nevus on the penis may also be caused by other factors, you should go to the regular hospital in a timely manner, under the guidance of the doctor actively line of treatment, and strive for early recovery.