The preliminary question would probably be "are there any unsolved problems or recurring issues that you have yet to solve (hence, unsolved)." This includes really any aspect internally of your personality or externally. Otherwise, it's mostly up to you to understand why you are having them. Maybe try some thinking exercises? Dream journal if you can, ask yourself why you are having these dreams. Possibly hypnotize yourself (you can find many tutorials on the net about this, and you can even try bwgen to hypnotize yourself). Remember - I will dream of flowers and butterflies and joy, not "I will not dream of death and destruction." (as a mantra)