One way that my grandmother passed down to my father to fix the palate of the baby. “It sounds like abuse but trust me it’s not”

When babies have something wrong on the soft spot on their head your grandma told me that if they fell or if something was wrong with that spot on their head what you needed to do was put the baby upside down, press your thumb against the top of their mouth, and tickle their feet. You must softly press on the roof of the mouth and it was supposed to help close that space, or push air around or something. This was called Mollera caida.

After research, I have found that this is a pretty widespread folk belief in the Hispanic community.