Thanks for writing your query.
Difficulty in balancing the body after head injury
usually occurs as a result of concussion injury
You can recover in few days from it by complete and rest.
Rest should be proper - physical and also avoid watching television, computers and text messaging.
Although you have only one symptom of concussion injury, still you should get yourself examined and investigated by a Neurophysician.
Feeling of revolving head can be treated by taking Betahistine
16 mg two thrice a day after discussing with your Neurophysician.
I hope this is helpful o you.