Could only sign of a brain injury in a 2 year old be crankiness? hit his head on cement 3 days ago. small bump on forehead gone. no other symptoms & he's getting molars. didn't lose consciousness or cry. perrla.

No problems: At this point it sounds like be is doing well just chalk it up to the school of hard knocks.

Head injury, 2yrsOld: Frontal bruse and think contra coup from rapidly deceleration on a fixed vessel, the skull; i.e., the visual cortex of the brain would have been disturbed.

Sounds normal: I wouldn't use "brain injury" as a descriptor (too loaded with worry)but a kid can be cranky for 1-2 wks after a simple fall.Toddlers can have the equivalent of a migraine come & go in the same time frame with this form of trauma, usually lasting <1hr at a time. If he didn't get knocked out i think the possibility of a significant issue approaches zero.