My Two And Half Yrs Old Child Fallen On The

my two and half yrs old child fallen on the hard platform by hardly touching the back head. After 7 days I found that she behave abnormally i.e speechless for 20 to 30 seconds and answering no questions. That type of behavior was found 5 times yesterday & two times today. One EEG has done today & reported abnormal graph & suggestive of interictal subcortical dysrhythmia. Now my question is that the behave is totally curable or not ? Is it dangerous ? If curable, how long it will taken & what medicine will take?