I think I'd just wait to see if the spots change size and/or color. If so, then a vet visit would be in order. When I first rescued Coco Puff, he had a similar spot on his ear. I took him in to be neutered and the vet asked if I wanted the spot removed but since it would be an additional surgery and I was having a number of cats altered, it would've been too expensive so I refused. That was 5 1/2 years ago and now I can't even find the spot.