Can cats get hayfever? Pollen allergies in cats explained

Can cats get hayfever? What the allergy is

Hay fever is an allergic reaction to pollen. In allergic cats, the immune system overreacts to harmless particles such as grass, tree or weed pollen. Vets often call environmental allergies in cats feline atopic skin syndrome, because the skin is where most signs appear. The same cats are frequently allergic to house dust mites, storage mites or moulds as well as pollen.

Allergies tend to start in young adult cats, often between six months and three years old, and can continue for life. They can't usually be cured, but they can be managed well.

Symptoms of hay fever in cats

Skin signs (most common)

• Itching, scratching, licking or chewing.
• Over-grooming, leading to thinning fur or bald patches, often on the belly, inner thighs and flanks.
• Small crusty scabs along the back and neck (miliary dermatitis).
• Red, raw patches or raised plaques.
• Swelling or ulcers of the lips (eosinophilic granuloma). See our guide to a cat swollen lip.
• Scratching at the ears and face.

Breathing and eye signs (less common)

• Sneezing and a clear runny nose.
• Watery, red or itchy eyes.
• Coughing or wheezing, sometimes linked to asthma.

Sneezing and runny eyes are more often caused by cat flu than by hay fever. If your cat also seems unwell, read our guide to cat cold symptoms, and for eye discharge see cat eye problems.

Pollen seasons in the UK

Pollen	Typical UK season
Tree pollen (birch, oak, ash, alder)	Late February to June
Grass pollen	May to August (peak June–July)
Weed pollen (nettle, dock, mugwort)	June to September
Mould spores	Late summer and autumn, damp homes all year
House dust mites	All year, often worse in winter with heating on

If your cat's itching follows a seasonal pattern, keep a diary. It helps your vet work out which allergens may be involved.

Other conditions that look like hay fever

Several common problems cause the same itching, scabs and over-grooming, so your vet will rule these out first:

• Flea allergy: the most common skin allergy in cats. Many allergic cats have no visible fleas because they groom them away. Strict, year-round flea control for every pet is the first step. See our flea treatment for cats guide.
• Food allergy: causes year-round itching, often around the head and neck, sometimes with vomiting or diarrhoea. Diagnosed with a strict elimination diet trial.
• Mites and lice: ear mites, fur mites and lice cause itching.
• Ringworm and skin infections.
• Stress-related over-grooming, which can look identical. Read our guide to cat calming products.

How vets diagnose hay fever in cats

1. History and examination: when itching started, which areas, seasonal pattern, diet and flea control.
2. Skin tests: tape strips, scrapings or swabs to look for mites, bacteria and yeast.
3. Strict flea control for all pets for at least 6–8 weeks.
4. A food trial with a hydrolysed or novel-protein diet for 6–8 weeks, with no other food or treats.
5. Allergy testing (blood test or intradermal skin test) if signs continue, mainly to plan desensitising treatment.

Treatment for hay fever in cats

Treatment	How it helps
Steroids (tablets, liquid or injection)	Rapid relief from itching and inflammation; usually used short term or at the lowest effective dose
Ciclosporin	Long-term control for many allergic cats
Other prescription anti-itch medicines	Your vet may use newer drugs depending on your cat
Antihistamines	Help some cats with mild signs; vet-prescribed dose only
Omega-3 fatty acids	Support the skin barrier; take several weeks to work. See our guide to salmon oil for cats
Allergen-specific immunotherapy	Desensitising injections or oral drops tailored to your cat's test results; can reduce reliance on medication
Treatment of secondary infections	Antibiotics or antifungals when scratched skin becomes infected

How to help a cat with hay fever at home

• Wipe your cat's coat with a damp cloth when it comes in on high-pollen days.
• Keep your cat indoors during peak pollen times, usually early morning and early evening, on high-count days. Check the Met Office pollen forecast.
• Close windows on high-pollen days and keep grass cut short (and keep your cat in while mowing).
• Wash bedding weekly at 60°C to reduce pollen and dust mites.
• Vacuum regularly, ideally with a HEPA filter.
• Reduce dust by using low-dust litter and avoiding scented sprays and diffusers.
• Keep up flea control, because fleas make allergic cats much itchier.

Can cats get hayfever from flowers in the house?

Cut flowers can shed pollen, but the bigger danger is toxicity. Lily pollen is extremely toxic to cats: even a little licked off the fur can cause kidney failure. Never keep lilies in a home with cats. Check any plant or bouquet with our toxic plant checker.

Living with a cat with hay fever long term

Environmental allergies usually last for life, but most cats live happily once a plan is in place. Many owners find it helpful to:

• Plan ahead for the season. If your cat's itching starts every May, ask your vet about starting treatment a few weeks early.
• Keep a symptom diary with dates, weather, pollen counts and what your cat was doing, so you and your vet can spot patterns.
• Photograph flare-ups, because skin often looks better by the time of the appointment.
• Review medication with your vet regularly, aiming for the lowest dose that keeps your cat comfortable.
• Watch for infections. Scratched, broken skin can become infected, which makes itching worse. Redness, smell or oozing need a vet check.

Can cats get hayfever at any age?

Allergies most often begin in young adult cats, but they can appear at any age. If an older cat suddenly starts itching or over-grooming, your vet will look carefully for other causes too, such as parasites, infections, pain or an overactive thyroid. Kittens rarely show true hay fever; itching in kittens is far more likely to be fleas or mites.

When to see a vet

Book an appointment if your cat is scratching or grooming more than usual, has bald patches, scabs or sores, or if sneezing or eye discharge lasts more than a few days. See a vet urgently if your cat is breathing fast, wheezing or breathing with its mouth open, which can be a sign of asthma. Most allergic cats can live comfortably with the right long-term plan, and the earlier itching is controlled, the less damage the skin suffers.

Cost of treating hay fever in cats

A consultation usually costs £45 to £80, and initial skin tests £30 to £80. Food trials cost the price of a prescription diet for 6 to 8 weeks. Allergy blood tests typically cost £150 to £300, and immunotherapy can cost several hundred pounds a year. Long-term allergy treatment is usually covered by lifetime pet insurance if the signs started after the policy began; see our guide to cat insurance.