Even people can be bit by fleas.
We normally do not feel the flea bite that intense. The flea injects the saliva in the wound to prevent the blood keeps running. Than the flea bites becomes red itchy bumbs. How can we distinguish a flea bite from a mosquito bite: flea bites often shows often shown in small groups on the legs or beneath the belt. Fleas bite people around the ankles or at least in the lower parts of the legs. Mosquito bites are more spread on the body.
Cat fleas are the most common flea when we do not vacuum cleaning during holiday periods.