The answer to 'what attracts flea' is that fleas are attracted to warm-blooded hosts, especially pets like dogs and cats. Fleas thrive in areas with pets, high humidity, and temperatures between 65-80°F. They feed on the blood of their hosts and can quickly infest a home if left unchecked.
Flea infestations can cause itchy bites, skin irritation, and even spread diseases to pets and humans. Common signs of fleas include seeing the fleas themselves, finding flea dirt (flea feces) in your pet's fur or on surfaces, and observing your pet scratching excessively.