My daughter suffer a head injury with fracture to her skull in mid August. Her recovery has been going great with no nausea, dizziness, or headaches. She had return to school and has not complained of any concentration issues. Recently, like a couple of days ago, she has stated that she is having some dizziness that comes and goes, lasts only a few seconds and does not matter whether she is standing or sitting or lying down. I dont know what to make of it given she had been symptom free for couple of months now. Help?