The presentation you’ve described is fairly consistent with a benign condition known as penile melanosis, also called genital lentigenes. It’s characterized by flat, pigmented (often brown to black) areas on the penis that typically appear in childhood or early adulthood and generally remain stable over time. Since you mentioned the patches have not changed significantly and are free of symptoms like pain or itching, this further supports the likelihood of a benign nature. Penile melanosis is usually harmless and doesn’t require treatment unless the appearance is causing distress.
Dermoscopy, a non-invasive imaging technique, can be helpful in distinguishing benign melanosis from other pigmented lesions without the need for biopsy. This method allows for magnified examination of the pigmentation and would be a reasonable next step if there’s any concern. Biopsy is typically only advised if there are changes in the lesion’s size, shape, color, or if new symptoms develop, suggesting something more than harmless pigmentation.
I would recommend an appointment with a dermatologist or urologist to confirm the diagnosis through clinical examination and possibly dermoscopy. This way, you can obtain peace of mind regarding the benign nature of your condition and understand if any further steps are needed. In the meantime, there’s no immediate reason for alarm, but do keep an eye on the area for any changes or new symptoms and seek evaluation if you notice anything concerning.
