My head is not round, but it is pointed at the top. How are the sides sunken?

It's okay. This is a genetic problem. It has something to do with skull development. Can't be corrected. Aplasia of head and face: there are malformations such as navicular head, triangular head and short head at birth, and some may have fontanel opening, sagittal shape, herringbone seam split, brain hypoplasia, narrow face, olecranon nose, small jaw, small mouth split, abnormal auricle, etc., so it is also called bird face deformity syndrome.

Among the known human congenital malformations, about 10% is directly caused by chromosome abnormality or single gene transmission room, 10% is directly caused by environmental factors, and the remaining 80% is the result of the joint action of genetic and environmental teratogenic factors, especially people with polygenic genetic basis are more susceptible to environmental factors.

Extended data:

Formation stage of the brain base: The above five pairs of cartilage (except the cartilage of the eye) surround the back of the eyeball and do not participate in the formation of the skull. After the other four pairs of cartilage heal, they form a cartilage groove to support the ventral surface of the brain, and the two sides slightly surround the brain and extend to the back of the brain to form a cartilage cover.

The soft skull thus formed has no top, only at the cartilage covering, and the two sides are connected at the top. Add posterior membranous bone and cover the back to form a complete skull.

Baidu Encyclopedia-Craniofacial Bone Malformation Syndrome