Hi there, thanks for asking. Many head traumas can cause post concussion syndrome
. There is no evidence in the MRI
or CAT scan, but the doctor can ask about many things like your mood, your anger control, your sleep, your concentration and etc to see if you have it. It is very important to treat it, otherwise it can cause problem for a long time. The bump itself should also be examined to see if there is any problem. I wish you a good health.