Hello, We Just Recently Buzzed My 5 (almost 6) Year

Hello, we just recently buzzed my 5 (almost 6) year old's hair and then noticed 5 brown spots on his scalp. 3 are about the size of an eraser, the other 2 are much smaller (pin point). I know that he had one "stork bite" when he was an infant, but are the others normal?