I'm 13 and haven't hit puberty yet. There's this sort of line of wrinkle that sticks out on the back of my penis and I'm really worried and don't know what it
![I always had this black thing on my penis,I just wanted to ask on what it is and how I can remove it | Penis Disorders | Forums | Patient I always had this black thing on my penis,I just wanted to ask on what it is and how I can remove it | Penis Disorders | Forums | Patient](https://patient.azureedge.net/forums/images/upload/1286820-637138026000833736.jpg)
I always had this black thing on my penis,I just wanted to ask on what it is and how I can remove it | Penis Disorders | Forums | Patient
![Man whose penis turned black and fell off turned to alcoholism | news.com.au — Australia's leading news site Man whose penis turned black and fell off turned to alcoholism | news.com.au — Australia's leading news site](https://multitools.newscdn.com.au/multitools/slider/content/1651451981202/malcolm-macdonald-penis-graphic-The-Sun_8uVvZAzOrQ.webp)