To see roaches in your dream represents an unwanted quality of yourself in which you need to confront. Maybe this quality is created by undesirable situation of your life. Alternatively, it may be a clever remark of your subconscious mind for smoking marijuana. On a positive note, roaches may also represent quality of being able to grip something firmly. Additionally, it also means longevity. Please also see cockroach.
Dream dictionary: Roaches dream meanings
Dreaming about cockroaches is not only unpleasant, but implies various risks and nervous diseases. Dreaming about a few cockroaches, hints that the dreamer will soon go through moments of shame and sadness. When there are many cockroaches it indicates that something serious is about to happen and the dreamer must be prepared, and must exercise self-control. Dreaming of crushing and killing one or more cockroaches and having them leave water instead of blood announces a prolonged illness. Dreaming of roaches climbing on a white wall and having hot water thrown at them, hints that the dreamer feels powerless against the disease that afflicts him. If the water thrown kills the roaches, there are many possibilities of relief, however, if the roaches are still alive and climbing the wall, the disease will follow its normal course.