I thought the same thing as you at first when I received the photos, that they were fakes. Upon investigating more and having someone with photo skills look at them. They aren't birthmarks but scabs. If you look at the other photos from reddit you can better see that mark is more on the red side then a typical mole's black color. Once I got my hands on the videos it was even more noticeable that they were red scabs from maybe a bee bite or just picking at your skin. Again, I did my due diligence and wouldn't have put this out there unless I was 100% sure. The reddit post I showed was just a gateway for me to use to bring up the topic for something I already knew.