It is more difficult to change the head shape of a child over five years old, and it takes a longer time. The child’s head shape can be changed at a very young age, five-year-old skull grows harder, it is more difficult to change the head shape, the bad head shape is usually caused by bad sleeping posture, long-term one side of the sleep or lie flat, which will cause uneven head shape, large angle of deviation or flat head. You can improve the bad sleeping habits, do not sleep on one side for a long time and lie flat, when sleeping can be properly padded pillow, after a long time will have some improvement, but it takes a long time. It is recommended to take the child to the hospital for examination, if the back of the head is flat, you can also wear a skull corrector under the guidance of the doctor.