Most common in warm spring and summer months, these pinhead-size insects can be active all year long. Fleas can jump onto your cat, lay their eggs, breed, and spread to your furniture and to you, looking for blood. In addition to causing discomfort and scratching in many cats, fleas can transmit parasitic or infectious diseases, including tapeworms. A severe flea infestation may, in turn, cause anemia (low red blood cell count) and/or allergic dermatitis, a skin allergy characterized by itching and irritation. Though some cats become irritable and scratch, others have no visible signs of discomfort.
Luckily, flea prevention treatments are numerous and easy to give: