To dream of the fleas, indicates some situation in your life that will cause stress, anger and frustration. Perhaps the unconscious mind is preparing you for this fight. If the fleas have bitten you, then you should reconsider your surroundings and find out of who your friends are. Perhaps there is someone who will be talking behind your back or will do much more of the harm.
Read more about dreaming of Fleas in other dream meanings interpretations.