Puffy baby face

Kez

I swear my little ones face gets puffy after a feed. Is this normal? He's formula fed and has been since 3 days where he was combi fed for 5 weeks and now 100% formula for the past 4 weeks. It's always been the same type and i think hes seemed a bit puffy many times but i never thought anything of it because he seems ok...

Is this something that can happen or shall i be concerned?