Seeing and at times just thinking about cockroaches makes a person feel squeamish and repulsed. When dreaming about these dreaded insects, the unconscious mind may be hinting to the dreamer that he needs to reevaluate and reassess a major part of his life. There is never just one roach; thus, the areas of life that need cleansing and renewal may be deep and wide.
The negativity or contamination that is represented by the roaches may affect a great deal of your life. Thus, this may be a call to clean your psychological, emotional, and spiritual self. (Also, examine your motives!) On a less dramatic note, cockroaches in our dreams may be associated with food and uncleanliness, so don’t leave the dishes for tomorrow!... The Bedside Dream Dictionary
To dream of roaches stands for a detrimental aspect of your personality, which may be better off contained. Alternatively, it may refer to marijuana. On a positive note, to dream of roaches may also be a representation of persistence and permanence.... Dream Symbols and Analysis