Adult fleas are not only a nuisance to humans and their pets, but can cause medical problems including flea allergy, tapeworms, secondary skin irritations and, in extreme cases, anemia.
Although bites are rarely felt, it is the resulting irritation caused by the flea salivary secretions that varies among individuals. Some may witness a severe reaction (general rash or inflammation) resulting in secondary infections caused by scratching the irritated skin area. Others may show no reaction or irritation acquired after repeated bites over several weeks or months. Most bites usually found on the ankles and legs may cause pain lasting a few minutes, hours or days depending on one’s sensitivity.