The answer to 'are fleas dangerous' is yes, fleas can be dangerous to both pets and humans. Fleas are small, wingless insects that feed on the blood of their hosts, which can include dogs, cats, and even humans. While fleas are primarily an annoyance, they can also transmit diseases and cause other health issues.
Fleas can spread diseases such as typhus, plague, and tapeworms. They can also cause skin irritation, allergic reactions, and anemia in pets. Pets that are infested with fleas may scratch excessively, leading to hair loss and skin infections. In severe cases, fleas can even cause a life-threatening condition called flea anemia in young or small pets.