stork bite?

Sadie
My son was born May 5,2017. He had red on his forehead and left eyelid (first picture) he's now 1 month old and the one on his forehead has cleared a lot (second picture) but just in the last week he got a big one on the back of his neck (third picture) someone on here kindly informed me uts called stork bite. I have read the ones on the face normally go away but has anyone had a baby with on on the back of thier neck? How long was it there or is it still there? And if you have any pictures I'd love to see this is new to me!