Seeing flies in your dream is generally considered a symbol of weak and low-character individuals. If a fly is near you, it suggests that there is someone in your life who may cause you harm. Eating a fly signifies earning impure money, which could be detrimental to you. Therefore, if you dream of flies, you should be cautious and aware of the people around you.
From Imam Muhammad Ibn Seerin's Dictionary of Dreams According to Islamic Inner Traditions â entry "Flies" (page 169).
In a dream, a fly represents a weak, lowly and a slanderous person. If he ever benefits anyone, it will be someone of his own kind. Eating flies in a dream means earning loathsome money. Seeing flies ruminating inside one's stomach in a dream means earning money from a loathsome and a despicable man. Seeing flies inside one's body in a dream means mixing with loathsome people. Whatever profits one may gain through them will not last. A large size fly in a dream represents a great enemy who will bring harm to the people and to the economy of the land. Flies flying over one's head in a dream represent a weak enemy who is desiring to triumph over him. It could also mean that someone in a high ranking position is influencing their moves or forcing them
to do what he wants. If someone who intends ajourney sees flies sitting on him in a dream, perhaps he should delay his travel plans for while. If one sees flies inside his mouth in a dream, it means that some thieves will take refuge or hide in his house. Ifa fly or a mosquito enters one's ear in a dream, it denotes blessing, status, authority or profits. Killing a fly in a dream means preserving one's health and fitness. If one sees a swarm of flies inside his house in a dream, it means that his enemies will cause him losses. Flies are a weak but a tough enemy. In a dream, a gathering of flies somewhere means profits, medicine, cure, abominable actions or committing an act that will bring rebuke.
Note: Islamic dream interpretation depends on the dreamer's circumstances and state. This is a general guide drawn directly from the source book.
