Had maxillary surgery to remove a cyst in august now i keep getting sinus infections with right side runny nose yellow mucus along with funny taste?

See surgeon: This is not the expected result from sinus surgery and thus you need to check with the surgeon re. The potential of any foreign body left behind especially if sinus infection was not the initial problem to start with if it was, then it may just be a continuation of the same process for which you should consult an allergist/immunologist.