Bailey and Payton had that vein inbetween their eyes and it did go away. Have no idea why some kids get that

Payton and Bailey both have these weird little skin things that I have. Don't know how to explain them but they look like little places of bunched up dry skin. I have one on my neck, shoulder, ribs and leg. Bailey has one on his shoulder and side and Payton has one on her neck (same place as mine-really strange!), leg and her armpit.
Zachary and Emily don't have any. What is even stranger is that Zach and Emily favor one another (and look more like DH's side of the family) and Payton and Bailey look more like me and have my kind of birthmarks. So weird.