I told my mom about that and she said it was ok/ normal. I think that it is a dry skin. Thanks for your advice!
You can't get an STD unless you have sex in some way. That's why it's called a Sexually Transmitted Disease. You may have an infection because of being uncircumsized or it may be a patch of dry skin. Does it hurt? Talk to your mom or dad about it. They may want to take you to a doctor to get it checked out.