The human flea, Pulex irritans, was previously the most common flea inside houses. Nowadays, the chances of finding a population of human fleas inside a house are very small. In rare cases, human fleas can survive in damp houses where the larvae mainly live in creeks in the floor, in upholstered furniture or in damp mattresses.
When human fleas are so rare today it is because the climate inside houses have become too dry for the human flea larvae, which need high humidity. Human fleas do not only live on people. They are also found on pigs in stalls, as well as on foxes, badgers and rats, but not in Denmark.
In Southern and Central Europe, the human flea is still common inside houses. Human fleas are controlled by spraying the house with one of the remedies used to control cat fleas.