and almost looks like some sort of burn. It tends to blanch when I press on it, and then the red/purple color returns.
It may be some type of AVM. At 8 months, he must have a "well baby" checkup coming soon. I might bring it up at that appointment, if it is still there.
Take a photo of it. IF IT CHANGES, take another photo LOL Try to document any changes for your physician to see.
Let us know how it turns out!