My 8 month old hit his head on the corner of a table. there is a bump but he cried for a few minutes and is now playing normally. should i worry?

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 minor. A bump coming out, means he has a blood pocket under the scalp, 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.