Bites from cat fleas have caused some dermatitis (skin irritation) in humans. Symptoms of dermatitis caused by cat fleas include severe itching, skin irritation, tenderness, and pain from scratching.

who found ten young cats and kittens in a dog crate. "They definitely look like they were malnourished. They definitely have flea dermatitis, which is basically hair loss from fleas eating at them ...