Recognizing a flea infestation involves looking for certain signs, both in humans and in animals. In humans, flea bites often appear as small, red, raised bumps, typically in clusters on the legs and feet. These bites are intensely itchy. On pets, look for excessive scratching, biting at the skin, or the presence of "flea dirt" (flea excrement) on the fur. Flea dirt resembles black pepper and turns red-brown when wet.
