hi, 5 days ago my son ran fast and hard right into a concrete wall! it was horrible! he was looking down at his feet. he immediately got a big bump and bruise on his forehead and there were no other symptoms at all. he was back to himself within the hour and i iced it for the first 2 days. my question is. .. should i still be keeping a close eye on him after 1 week or would he have other symptoms before that., if there was damage such as brain injury, fracture, or internal bleeding. thank you. ps- he is suppose to go away with his dad next week but i am worried about him leaving b/c i have heard there could be problems even after 72 hrs. ps- my son is 5 yrs old and the bump has gone down, the bruise is now yellow. it is rt on his forehead. he was running fast! and the wall he slammed into is hard!! concrete!!!!