Cat allergy is an immune reaction to proteins found in a cat’s skin flakes, saliva and urine. These proteins can remain in dust, clothing and furnishings for a long time. The fur itself is not the main allergen.
Symptoms
- Sneezing and an itchy, runny or blocked nose
- Itchy, red or watery eyes
- Coughing, wheezing, chest tightness or shortness of breath
- Hives, itchy skin or worsening eczema
Seek urgent medical help for severe breathing difficulty, blue or gray lips, confusion, collapse or swelling of the tongue or throat.
Diagnosis
Diagnosis is based on the pattern of symptoms and exposure. Skin prick or specific IgE blood testing may help, but a positive result should be considered together with the person’s symptoms and medical history.
Reducing Exposure
Avoiding the animal gives the greatest reduction in exposure. If a cat remains in the home, keep it out of the bedroom, wash bedding regularly, clean with a high efficiency vacuum and reduce furnishings that collect allergens. Cat allergens can also be carried on clothing from homes with cats.
Treatment
A pharmacist or healthcare professional may recommend antihistamines, a corticosteroid nasal spray or allergy eye drops. Asthma and eczema require appropriate treatment. Seek medical advice when symptoms persist, affect sleep or worsen breathing.
Sources
Reviewed 28 August 2026.