It's common for the pubic area to have discolored skin. I''ve had freckles come on my arms. It's all part of getting older with age.
It seems that a lot of men get these freckles on their scrotum and they are nothing to worry about.
However, if they change shape or size, then get them checked out, just to be on the safe side - as change in shape or size of a mole or skin tag can be indicative of skin cancer.
Freckles on the scrotum
Are they definitely freckles, not moles, skin tags of warts? Warts can be dangerous so you would want to get those checked as they are contagious.
I know you might be thinking "cancer" - but this is highly unlikely, as freckles are not a manifestation of cancer affecting this area of your body.
Having said that, if you are worried, it is always best to see your doctor and get a professional diagnosis, if only to put your mind at rest.
I don't know your age but it does seem that freckles appear on our bodies as we get older, I know I have several more than I used to have and I am dreading getting 'age spots' on my hands in the coming years.
Anyway, to sum up, I would say that there is nothing to worry about unless the size or shape changes (or there is the possibility that they are warts). But if you are worried, see a doctor!