Last Updated: 25/08/2026
How to Identify and Treat Insect Bites on Dogs: A Vet's Guide
Is your dog itching or swollen? Discover how to identify common Australian insect bites, including bees, ants, mosquitoes, and spiders. This vet-guide covers symptom recognition, soothing home treatments, and vital signs of allergic reactions.
Author: Dr Brittany Ward BVSc
Reading Time: 11 minutes - short read
As the Australian sun warms up and we head outdoors for beach trips and bushwalks, we aren't the only ones enjoying the weather. The hum of a summer afternoon often brings unwelcome guests: mosquitoes, bees, and feisty ants. While a minor nibble might just cause a temporary itch, some insect encounters can lead to painful swelling or serious allergic reactions for our furry friends. Understanding which critter caused that red bump and knowing how to respond - whether with a cool compress at home or a dash to the emergency vet - is essential for every pet parent. Let’s look at how to safeguard your pooch so they can enjoy the great outdoors safely.
What does an insect bite look like on dogs?
There are a vast number of insects that can bite our pets, resulting in a vast array of associated symptoms that you may see. However, the most common symptom is raised, red lumps or hives. Itchiness, pain, and licking or chewing at the bite site can be common to all bites and stings.
Spider bites and bee and wasp stings are the most common types of insect bites and stings in dogs. See our dedicated spider bites in dogs and bee and wasp stings in dogs guides.
Some of the unique characteristics of other types of bites include:
- Mosquitoes: an itchy round welt under 1cm wide, typically covered with fur.
- Fly and midge bites: raised, red, swollen itchy lump. These bites are often most painful when they initially occur, so you will probably see your dog spin around or snap at these flies to shoo them away.
- Ants: sudden redness between the toes, mild swelling, small red spot, possibly with a white centre like a pimple (esp. Fire ants)
In Australia, snake bites, flea bites, and tick bites are especially common. Read through our dedicated guides for identification, treatment and prevention tips.
Where do insect bites usually appear?
Sometimes the location of the bite can give us an indication of the likely insect that caused the bite. This is due to the lifestyle, habitat and nature of the insects, as well as the habits of our beloved furry friends. For example, if your dog has been sniffing around in a rose bush, they are probably going to get stung by a bee on their face!
Common bite locations include:
- Muzzle/Nose - Bees, Wasps, Ants and Spiders
- Face - Ticks, Mosquitoes, Flies, Bees and Wasps
- Ears - Mosquitoes, Biting Flies, Ticks and Fleas
- Neck - Fleas
- Back - Fleas (particularly near tail base), Mosquitoes and Biting Flies
- Belly - Fleas and Ants
- Legs and Paws - Ants, Spiders, Ticks, occasionally Bees and Wasps. Fleas on back of legs, and inside thighs.
When is a bite or sting an emergency?
Dogs can potentially have a severe allergic reaction or anaphylactic reaction to any insect bite. Allergic reactions are severe, can potentially be life threatening and require immediate veterinary attention.
Seek immediate veterinary treatment if your dog shows any of these signs:
- Swollen face, neck or limbs
- Welts or hives all over the body
- Lethargy
- Fever
- Whole body itching
- Anxiety or restlessness
- Inappetence
- Excessive drooling
- Vomiting
- Diarrhoea
- Pale gums
- Dizziness, disorientation or staggered gait
- Difficulty breathing or wheezing
- Seizures
- Paralysis
- Collapse
- Loss of Consciousness
Signs of an allergic reaction typically present within 20 minutes of a bite occurring, however, sometimes a delayed reaction may occur, not presenting for up to 4 hours. If you see any of the above symptoms at any point following an insect bite, seek immediate veterinary attention.
How can I prevent insect bites on my dog?
Use parasite preventatives year round, reputable products like Nexgard, Bravecto or Simparica cover fleas, ticks, mites and lice, but most won't protect against biting insects like mosquitoes and flies. For that, a product like Advantix is registered specifically to protect against mosquitoes, midges and biting flies as well as fleas and ticks, just be cautious using it in households with cats, as it's highly toxic to them.
For full details on the level of parasite prevention your dog needs and which products are the best, check out our Flea Tick and Worming Guide for Dogs.
Avoid human insect repellents on your dog. DEET and certain essential oils, including Citronella, are toxic to dogs, and products containing Pyrethroids (like Permethrin) must be used strictly as directed and kept well away from cats, who are highly sensitive to them.
A few other ways to cut down on bites around the house and yard:
- Remove standing water and refresh pet water bowls and paddling pools daily to stop mosquitoes breeding
- Clear spider hideouts like old tyres, woodpiles and leaf litter, and keep sheds tidy
- Call a professional for wasp nests or beehives, keeping your dog indoors while it's handled
- Keep your dog on a lead near flowerbeds or ant nests, and work on a solid recall for when they go snapping at bees or wasps
- Use fly screens and fine mesh on outdoor pens, and avoid peak insect times, mosquitoes are worst at dusk and dawn, bees and wasps in the middle of the day
- Pet-safe repellent plants like Basil, Rosemary, Lemon Balm, Catnip and Marigolds can help too. Always check a plant is pet-safe before bringing it home
For more information, read through:
How can I treat insect bites on my dog at home?
Most mild insect bites and stings will settle within 24–48 hours. If you identify a tick or suspect a spider bite, head to the vet immediately. For other common bites, you can provide relief at home with these steps:
- Remove any stingers: If a bee has left a stinger behind, scrape it away using a credit card or fingernail. Avoid using tweezers, as squeezing the stinger can inject more venom into your dog.
- Use a cold compress: Apply a cool pack or frozen veggies wrapped in a towel for 5–10 minutes. This helps reduce localised pain and swelling.
- Stop the scratching: Prevent your dog from licking or biting the site to avoid secondary infections. You may need an Elizabethan collar (the "cone of shame") or a pet t-shirt to protect the area.
- Soothe the itch: For multiple bites, a cool oatmeal bath can provide relief. For a single spot, a thick paste of baking soda and water applied directly to the bite can help calm the skin.
- Monitor for 24 hours: While most reactions happen quickly, some can be delayed. Watch closely for signs of a severe allergic reaction (like facial swelling or vomiting) or signs of infection (like heat, redness, or discharge) over the following days.
When should I take my dog to the vet for an insect bite?
With so many biting insects and potential reactions, you might be struggling to determine what warrants a vet visit and what can be managed at home. Here are the key indicators of when to seek veterinary care:
- First time bites: If your pet has never been bitten by an insect before, or by this specific insect, then it's a good idea to take them into the Vet for monitoring in case any severe reactions occur.
- Signs of anaphylaxis: An allergic or anaphylactic reaction is a medical emergency. Any signs of anaphylaxis indicate immediate veterinary care.
- History of severe reactions: If your pet has a history of anaphylactic reaction to bites or severe reactions, then be prepared and take them in as soon as they are bitten.
- Spider bites: Spider bites are poorly understood and can have a wide variety of reactions, some are potentially even fatal. If you suspect a spider bite, it should be treated as an emergency.
- If you're uncertain: If you have any concerns, your dog seems to be very uncomfortable or the bites don't appear to be healing, then it is always a good idea to seek veterinary consultation.
- Signs of infection: Insect bites can be susceptible to secondary infection from bacteria on the skin, under nails or in the mouth. If you notice persistent swelling, persistent redness, heat, discharge and pain.
FAQs
Everyday your dog is potentially at risk from being bitten by a vast variety of insects and arachnids. To provide them with the greatest chance of protection, be sure to implement a variety of preventative measures around your home. Learning how to recognise and treat the most common bites will prepare you for a prompt response when a bite does occur, especially in the event of a spider bite, paralysis tick or anaphylactic reaction. If you are ever in doubt, feel free to contact us, or take your pet in to their local Vet for examination and prompt treatment.
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History
Our experts continually monitor the health and wellness space and we update our articles when new information becomes available.
Wed 26 Aug 2026
Edited by Dr Gillian Hill BVSc (Hons)Dr Brittany Ward BVSc
Veterinarian
Dr. Brittany graduated from James Cook University in 2019 with a Bachelor of Veterinary Science and started working in her home town in the Wide Bay-Burnett Region. She has always been excited about working in the veterinary industry, but over the last few years has grown especially fond of dog behaviour and training, surgery and orthopaedic disease.
