It doesn’t matter if the back of the head is flat or protruding, the shape of the head doesn’t affect the development of intelligence, it only affects the beauty of the head, and a head that is too flat or too protruding is unattractive, and a head that is moderate is good. The flat or protruding back of the head is generally associated with the infant stage of the sleeping position, especially in infancy, basically a sleeping position, there will be a flat or protruding back of the head, if you often turn over the force point is not concentrated in the back of the head, then the back of the head will be flat. Generally speaking, if it is a girl, often have to tie hair, then the back of the head protrudes is better. If it is a boy, the back of the head flat is better, because boys have shorter hair, may shave flat head, bulging out the back of the head is not good. But it also depends on personal aesthetics. In fact, the back of the head is too flat or too protruding is not good, according to the individual’s head shape to decide, generally moderate is good.