Posted 7/20/2014 4:15 PM (GMT -6)
Welcome to the forum, NDanielMarian51.
We're not doctors, but hopefully someone will come along with some advice better than mine.
There are myriad causes of brown spots on skin. If you Google the words you'll come up with pictures of different types and all sorts of things that could make them.
If you are worried, I'd suggest trying to get him to a dermatologist.