Son possibly bumped his head

Da

Okay to start yes I’m extremely protective over my son and worry a ton but I picked him up from day care and usually they are great at writing accident reports if he gets hurt but I picked him up and they said he wasn’t eating much today and for him to not eat even his solids is odd for him he’s 8 months anyways I didn’t notice till we got home and I was taking his coat off and saw he had a red spot on his head and a little bump so of course I panic waiting for his doctors office nurse line to call me back for advice and tried calling day care and left a voice mail about it they haven’t returned my call but just wondering if anyone knows any signs or symptoms I should keep a eye out for

Was hard to get good picture he kept moving and I swear it looks worse then in this picture shows