The back of the head in the human body has a curved or round-like shape and no completely flat structure. The unevenness of the back of the head, but the patient does not experience significant dizziness, headache or abnormalities of the head, does not cause any effect on the human body. It is possible that the individual has cranial abnormalities during congenital development, or the unevenness of the back of the head may be caused by cranial compression due to improper sleeping posture during infancy. If the patient has obvious unevenness of the back of the head, accompanied by obvious headache, dizziness and other related clinical symptoms, it is recommended that the patient should go to the hospital as soon as possible to improve the CT or MRI examination of the head to clarify whether it is accompanied by intracranial occupying lesions or cranial abnormalities. For patients with intracranial occupying lesions, surgery should be performed as soon as possible to avoid serious complications.