I'm asking for a friend his legs are so swollen from knee on down it's like they're ready to pop he said it doesn't bother him but i just want to know what that could be? it has affected his groin area making it hard to urinate?

Not only leg edema (fluid retention) he also has scrotal edema as well. Your friend has severe edema, he needs to see a doctor for the diagnosis and treatment. In the meantime, he should limit both salt and fluid intake (no added salt or sauce in his foods and limit fluid to less than 1.2 liters (around 40 ounces).

There are too many conditions that can cause leg edema or swelling and many times is a combination of factors contributing to it. The best you can do is to convince your friend to see his doc and keep his legs elevated during the day.