Tell fortune to people with high sternum.

My son is eight years old. How high is the right sternum?

The deformation or bending of bones is caused by incorrect posture for a long time. Your child is only five years old, and his sternum height is inconsistent. This is probably because your child's sleeping, sitting and standing posture is incorrect and a little skewed. Some people always tilt their heads when walking, sleeping or writing, which may cause the sternum to deform and bend, resulting in different sternum heights.

So you must urge your child to correct the posture of standing, sitting, sleeping and walking, so that he can stand as loose as a bell, walk like the wind and sleep like a bow. Give him a reward and punishment system appropriately, reward him if he does well, punish him if he doesn't do well, and urge him to correct all his daily postures, which is conducive to the recovery of his sternum position.

If you are worried that he can't do it well just by urging, you can buy a posture-correcting product such as a back.