My 15 month old bumped heads with my 4 year old and got a nosebleed, which has stopped. she and her nose seem fine. do i need to worry at all?

No knockout/no pbm: The trauma that knocks you out, even briefly, has produced a concussion.If the trauma wasn't enough to cause even brief loss of function is unlikely to be a problem.Some will throw up once or seem dazed with a headache.If she starts vomiting multiple times, i would have her seen.The nose of most at that age is pretty forgiving.