Swollen penis?

Malarie • 26 years old, Married, Mother of a 7 yr old girl & newborn boy!
My 3 week olds penis seems to be a bit swollen. He's uncircumcised but I make sure I clean him well when I change him. I noticed it was swollen yesterday when I was changing him. It's not red and it doesn't seem to bother him when I touch it while changing him. Anyone else with lil boys experienced this? Any idea as to what it can be?