India, Oct. 2 -- The first days with a newborn are full of quiet observations, unexpected worries, and moments that make you pause. Every little change feels significant, and even the smallest detail can spark questions.

One woman, Casi Trues Delle, noticed something unusual about her baby and decided to consult the neurologist, who revealed a surprising truth about her baby's remarkable healing process. (Also read: Neurologist says your brain could be crying for help: 'These everyday habits may actually be signs of anxiety' )

Casi shared in a September 27 Instagram post that in the days following her baby's NICU stay, she noticed something unusual, his fontanelle, the soft spot on his skull, seemed to be sinking more each day. Concerne...