Is Sleepwalking A Side Effect Of Having Sustained A Concussion?

My daughter (17) sustained a concussion 17 days ago. Since that time she has woken two separate times with bumps on her forehead. I am guessing she is sleepwalking and has no recollection of that. Could that be related to her concussion? (She has never been known to sleepwalk in the past) Is this something I need to be concerned about? Thank you