The answer to 'flea swarms' is that they are a common pest problem that can quickly become an infestation in homes. Flea swarms are caused by an explosion in the flea population, often due to pets bringing fleas into the home or an existing flea problem that has gotten out of control. Symptoms of a flea swarm include seeing large numbers of fleas jumping on pets, furniture, and carpets, as well as pets excessively scratching and biting at their skin.
The best solution for a flea swarm is to treat the entire home, including treating pets, washing bedding, and thoroughly vacuuming and treating carpets and furniture. In severe cases, or for those who don't feel comfortable handling the treatment themselves, it's best to call in a professional pest control technician who can use more heavy-duty treatments to get the flea population under control.