Had a laser hair removal on penis, darkened skin after 6hrs. I’m worried about this being permanent? (photo)

I would discuss this with your physician. It might respond to a skin bleacher such as hydroquinone but you must make sure the skin in this area can tolerate it. It will generally fade with time but might not completely fade. Also make sure that a 1064 laser is used because you have a darker skin type.

Your penis skin appears dark on the undersurface. It is normal for every male to have a darkened line on the undersurface of the shaft of the penis. Additionally, hair is only present on the proximal part of the penis and your darkened area goes all the way to the end of the penis. It is unlikely they performed laser hair removal on the distal penis that does not contain any hair. Is it possible you always had this and never noticed it because it is on the undersurface? If the skin was burned with laser hair removal, which is certainly possible, it should feel like a burn and you need to see you provider as soon as possible

I am not aware the penis has hair to be treated, but as this is your concern, I would ask the physician who performed the laser to evaluate your results. They might be temporary but in any event you might not be a candidate for penile laser hair removal.