My son fell and hit his head and has a huge knot--what should i do?

Head injury: How old is your son? In infants theri skull is very thin and has a higher chanvce of fracture. If yor son cried right away and had no loss of consciousness and has nbo other neurological deficits that you see, you could take your tiem to take him to the docotr otherwise you may need to take him to the ed if he has neurologial symptoms.