Most people who dream about arguments have repressed feelings and tensions inside which they refuse to solve or let go in the waking life. Therefore, if you argue in your dream you should take this as a caution that there is a lot of negative energy accumulated in your subconscious which does not let you achieve balance and happiness. You are stuck in a place you cannot move on from because you are not capable of expressing your feelings and emotions, especially negative ones. Individuals who have argument dreams should learn to express their anger and disappointment when the case, not to bury it inside themselves because it will eventually come to haunt their dreams.
There may also exist an internal conflict which tears you apart and the subconscious will repetitively introduce it into your dreams.
Arguing in dreams may also be a sign that you should consider things more carefully before taking a decision and not let yourself ruled by emotions or impulses.