2 yo hit head-on cement 2 days ago. no loss of consciousness or crying. small bump forehead. eat & drinking fine. very irritable today. also getting molars. no other symptoms of brain injury. should i worry?

Probably not: If symptoms of drowsiness or vomiting occur usually indicative of serious intracranial injury.If eating well a good sign. Lumps on head following trauma can be related to fracture, hematoma, etc. Soreness from this can cause irritability. If irritability continues should see your physician, may order ct examination of the head.

Head injury; teethin: Is irritability new since head injury or was it present before due to teething? Depending on answer, may wish 2 have child seen by pediatrician for subtle signs of concussion. Otherwise, reduce swelling with ice off & on. Watch for extreme drowsiness, projectile vomiting, personality changes, fluid from ears.

Likely no: Sounds like you have been well educated in what to look for, and have reviewed the key aspects. Without loss of consciousness, and the injury 2 days ago, a serious problem is very unlikely. As acting and acting ine, the molars can easily be the cause of irritability. Good to be so aware and attentive!

Cranky after fall: The irritability could be from a headache (less from teething) especially if bump is tender. A non-displaced fracture can produce pain. Although not related to the accident, check him for fever as that may cause the symptom as well. It might not be a bad idea to have him checked for other undetected body injuries by his pediatrician.

FYI on concussion: I agree with colleagues that @ 2 days out & no Hx of mental status changes that chances of really bad stuff brewing are highly unlikely. Irritability could be due to other things. However, let's be clear on one point, concussions (i.e. TBI's) no longer defined as requiring "loss of consciousness" & subtle neuro changes can occur over time. Took good whack.Bump proves that.

Probably not: The symptoms you describe are not likely to indicate a concussion. If you continue to have concerns, see your pediatrician.