If you dream of a werewolf this denotes that something is wrong in your life. Perhaps you repress your anger, fear and all the other negative emotions. In the dream you are a werewolf means that negative emotions damage and hurt you from inside, this is not very good for your physical or emotional state. Also the werewolf in the dream indicates your wild instincts that are restrained.
Read more about dreaming of Werewolf in other dream meanings interpretations.