Insect bites in cats

Insect bites in cats are a common problem and can happen at any time of the year, though they mostly tend to occur in the warmer months. Cats can be bitten by a variety of bugs, including ants, fleas, and flies. Insect bites can happen to cats of any age but tend to be more common in young, inquisitive cats. 

Some insects, such as ticks, can spread disease, so it’s best to use parasite preventatives when your cat is at risk. Most cases of insect bites resolve without treatment. Allergic reactions to bites can be serious but these are luckily rare. Bites around the mouth and neck can lead to more severe symptoms. Speak to a vet about the next steps if your cat has an insect bite.



What are insect bites in cats?

Insect bites in cats are usually caused by bugs they come across when outdoors, but bites can also happen at home.

  • Bugs such as ants, midges, mosquitoes, flies, ticks, and even spiders can bite cats
  • Insect bites tend to be most common around the head and limbs
  • The reaction comes from the saliva or venom from the insect
  • Insect bites in cats are common in spring, summer and autumn
  • Insects such as ticks and fleas can spread disease
insect bites in cats
Ticks on the skin

Most cases of insect bites can be treated at home. Our Joii vets are available 24 hours a day if you have any questions about insect bites in cats.



Symptoms of insect bites in cats

The most common signs of insect bites in cats include:

  • Swelling and red skin: usually localised to the area of the bite
  • Hives: areas of soft, raised skin
  • Sudden licking or biting at an area, often excessively
  • Limping, or holding up a paw
insect bites in cats
Insect bites can a sudden intense itch


In rare cases, cats can develop a life-threatening allergic reaction to an insect bite, called anaphylaxis. This usually happens within 20-30 minutes of a bite, but it can also occur days later. The symptoms of this include:

Any cat with these symptoms needs to be seen by a vet immediately.  


Some insects can spread diseases such as Ehrlichia, Lyme disease and tapeworm. The symptoms of these diseases are covered in the articles – find out more by following the links.



Are some cats more at risk of insect bites?

Any cat, regardless of age or lifestyle, can develop an insect bite.

  • Kittens and young cats tend to be more inquisitive, leading to a higher risk of insect bites
  • Cats with allergies can be at a higher risk of a more severe reaction to an insect bite


Spread of disease through insect bites in cats

  • Ticks can spread Lyme disease, Babesia and others.
  • Fleas can spread tapeworm and a bacteria called Bartonella. Flea bites can also trigger a condition called flea allergy dermatitis.
  • If you take your cat abroad, they can be at risk of bites from sandflies that spread Leishmania and mosquitoes that spread heartworm.


Cats can develop a condition called eosinophilic granuloma complex as a result of an allergy to insect bites. Symptoms include a swollen lip and thickened patches of skin. It’s usually treated with antibiotics and anti-inflammatory medication.


In rare cases, it’s thought that insect bites can lead to a condition called Eosinophilic Furunculosis. This is a deep infection of the hair follicles and usually affects the eyes and nose. Symptoms can progress quickly but the condition responds well to a course of anti-inflammatory medication.



How are insect bites diagnosed in cats?

As most insect bites resolve without treatment, diagnosis is usually not necessary. If the skin is not healing, your vet may take a swab, FNA or biopsy of the affected area.

Blood and urine tests are usually needed in cases of severe allergic reactions.

Vet treatment

What’s the treatment for insect bites in cats?

Most insect bites resolve without treatment. However, some cats may react more severely and may benefit from:

  • Anti-inflammatory or anti-histamine medication for cats that are itchy or uncomfortable
  • Antibiotics for secondary infections

Treatment for severe allergic reactions is more intensive and usually includes hospitalisation, fluids, and oxygen therapy.


Home treatment

How to look after a cat with insect bites at home

Most insect bite reactions can be treated at home, unless the symptoms are severe.

  • If there is a tick, remove it as soon as possible. Get help if you are unsure how to do this correctly.
  • Use a cold compress for 5-10 minutes on the affected area of the skin to reduce swelling. You can use an ice pack or frozen veg for this; just make sure to wrap it in a towel before using it on your cat’s skin.
  • Prevent your cat from licking or biting: self-trauma can lead to a skin infection.
  • Monitor your cat for any signs of a severe reaction.
  • Make sure they are able to eat and drink as normal. Softening the food can help if the bite is around the mouth area.
  • Avoid using any creams or solutions on the bite unless you’ve been advised to do so by a veterinarian.

Our Joii vets are available 24 hours a day. Call us for advice if your cat has had an insect bite.



Tips on how to prevent insect bites in cats

Insect bites from ants and flies can be difficult to prevent and bites from these bugs usually self-resolve. It’s more important to prevent bites from disease-spreading insects such as ticks. Use a vet-approved parasite preventative against fleas and ticks.


Is my family at risk of catching insect bites from cats?

Though they don’t tend to spread from cats, humans are also at risk from bites from the same insects, such as ticks and fleas. These insects can carry diseases such as Lyme disease. Speak to your GP for further advice if you have been bitten by an insect.


When to worry

When you should be worried about insect bites in cats

Seek help from a vet if your cat:

  • Is collapsed
  • Has severe, sudden-onset vomiting and diarrhoea
  • Is drooling excessively
  • Is constantly itching and uncomfortable

Call us and speak to one of our Joii vets if:

  • You have questions about treating insect bites at home
  • You have questions about parasite control in cats
  • Your cat has a mild skin problem
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