Son #4 hit frequently his head between 18 and 36 mos. After one of those resulting knots began to swell slowly (indicating brain fluid, not blood), I rushed him

Son #4 hit frequently his head between 18 and 36 mos. After one of those resulting knots began to swell slowly (indicating brain fluid, not blood), I rushed him to our pediatrician. Our family Dr of 10yrs examined #4 for a bit and then started addressing me as sir. Which told me his next call would be to the police if I didn't talk him off the ledge. I did, he didn't and we got #4 into a padded helmet for the next year or so.