I am turning to 18. I am 172cm tall and 87kg in weight. I've got a flat head problem on the back and two sides of my head don't match. More importantly, I have got a small head. No matter how much hair I have, it always seems small.From the photo, you can see left and right side of my head do not much and from the second photo, it is obvious that I have a flat head. My concern is more about the size of my head. It is very small. Is there any way to enlarge my head and how much would it cost?