You should first treat the dog with an effective anti-flea product. It is important to treat all animals in the household as well as the sleeping places of the animal with the anti-flea treatment. You yourself do not have to undergo treatment as dog fleas bite humans only briefly. The body temperature of humans is unpleasant to dog fleas and therefore they leave after a short time. If no improvement occurs, you should have your animal checked by the vet for other parasites. An allergy of the dog can also be responsible for the itching.