Fleas are blood-feeding parasites that mainly feed on mammals. Fleas can carry and transmit diseases and other parasites. Fleas bites can cause discomfort, pain, and itching. We treat for fleas by spraying the entire home. If you have pets, we recommend you get them treated at your local vet at the same time. Fleas can take up to 30 days to fully eradicate because they have a long life cycle. There is high success rate for eradication within 30 days when the instructions for before and after treatment are followed. Fleas can be particularly difficult to get rid of in vacant properties because they are dormant when there is no activity.