Here is an article that reveals some of the issues that have led to the “flat head ” troubles that plague many modern babies…Baby wearing solutions allow baby’s neck muscles to develop and for their head to be upright..
Here is another comment on the same subject. (This was not a problem when my babies were infants because they slept on their tummys)
“Plagiocephaly has really become a major issue with the Back to Sleep Campaign. Many children have skulls that are softer than others and flat areas develop quickly simply because the parent/caregiver is doing what they’re told told to do to keep the child protected from SIDS. Left untreated, the child may have facial, dental, vision, digestive, and social issues. “