If you have dreamed of a swarm of flies in your dream: You can see better that you need to put some of your plans into practice due to some changes or different events. Flies are a type of insect that travels in dirty places and threatens human health, and the swarming of flies does not bode well. It means that people around you who want to take advantage of you will put you in a difficult situation. They will come upon you and leave you helpless. We can say that you should be cautious with these people and take your defense.