VIDEO : Chrissy Teigen's son Miles is going through helmet therapy. Here's what that means.

On Monday, Chrissy Teigen shared onTwitter that her youngest child Miles would begin wearing a helmet to help fix his flat skull.
The helmets are used to fix positional plagiocephaly, a condition that can occur when a baby's sleep position misshapes their skull.
According to Business Insider, parents usually will notice their baby's skull is deformed around two to three months after birth.
In solidarity, other Twitter users responded to Teigen with photos of their own babies wearing similar reshaping helmets.