Looks like a cherry birthmark. They usually go away when older. My daughter has a small one behind her ear and u could barely see it. And shes 5.i notice it fading away by age 3. Just be careful with it. That no1 scratch it or baby. Cuz it could get infected like my younger sister did. She was born with one on her right leg and some how it got infected and it was bad. That now she has a scar cuz if it.