Plagiocephaly, also known as flat head syndrome,[1][2] is a condition characterized by an asymmetrical distortion (flattening of one side) of the skull.

A mild and widespread form is characterized by a flat spot on the back or one side of the head caused by remaining in a supine position for prolonged periods.

Depending on whether synostosis is involved, plagiocephaly divides into two groups: synostotic, with one or more fused cranial sutures, and non-synostotic (deformational).

Slight plagiocephaly is routinely diagnosed at birth and may be the result of a restrictive intrauterine environment giving a "diamond" shaped head when seen from above.

[5] The incidence of plagiocephaly has increased dramatically since the advent of anti-sudden infant death syndrome recommendations for parents to keep their babies on their backs.

Crawling also boosts gross and fine motor skills (large and refined movements), balance, hand-eye-coordination and overall strength.

[13] Initially, treatment usually takes the form of reducing the pressure on the affected area through repositioning of the baby onto their abdomen for extended periods of time throughout the day.

[15] High quality evidence is lacking for cranial remolding orthosis (baby helmet) for the positional condition and use for this purpose is controversial.