My 14 month old son has banged his head & his a bump on his head but seems fine do i need to take him to hospital

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 ever yield brain damage. A bump coming out, means he took a good ding, but should do fine.Some will throw up once or seem dazed with a headache.If he starts vomiting multiple times, i would have him seen.

Probably not: If he's running around a playing and acting fine, then he's fine. If he is disoriented, vomiting, lethargic, crying inconsolably, or behaving in any uncharacteristic way, it's better to have a doctor look at him.