FTM baby hemangioma

Issa
I have a few questions regarding this. Its on top of his head it seems to me its getting smaller but its getting rounder. Don't know what to think of it i know its unharmful to my baby but i spoke to the drs n they told me to keep an eye on it . Do any mommies have any experience with this. Would love some help/advice btw he is 3 months old