The positional plagiocephaly / skull deformation and popularly also often referred to as a flat head, is becoming increasingly common and the trend is still rising. Very decisive are the first 6 months after birth, because the head is still very soft and deformable. If a preferred side / imbalance is not recognized as such by the parents and the baby is lying on the back most of the time, the plagiocephaly / skewness caused by the position develops very rapidly. The asymmetry of the head is interpreted by parents, friends and relatives as a possible pathological disorder. The unsettled parents turn to the pediatrician and often experience a trivialization of the cranial deformation. There are statements such as: “… I see no need for action”, as well as “.. that’s growing out again”, or “… it is, if anything, only a cosmetic problem” unfortunately not uncommon. Furthermore, the statement holds that babies should not use a pillow at all. This statement is no longer up-to-date!