Frequent scratching, biting, or licking
Restlessness or discomfort
Hair loss, especially around the neck, tail base, or belly
Small black specks in the fur or on bedding
Flea dirt that turns reddish-brown when wet
Visible tiny brown insects moving through the fur
Red, irritated, or scabbed skin
Pale gums in severe infestations
Tapeworm segments near the anus or in feces
Excessive grooming with little relief
Flea comb catches fleas or flea dirt
Other pets in the home showing similar signs