Frequent scratching, biting, or licking, especially around the neck, back, tail base, and belly
Restlessness or trouble settling down
Small black specks in the fur or on bedding, known as flea dirt
Tiny moving insects seen in the fur, especially near the skin
Hair loss, thinning fur, or irritated skin from excessive scratching
Red bumps, scabs, or skin inflammation
Pale gums in severe infestations
Flea dirt that turns reddish-brown when placed on a damp paper towel
Increased grooming compared with normal
Flea eggs or debris found on bedding, carpets, or furniture
Signs of flea allergy dermatitis, such as intense itching and skin sores
Visible fleas when parting the fur, especially on the lower back and tail area