Does a mosquito bite also itch dogs?

Mosquitoes don't just bite humans. Dogs get bitten too, and it itches just as much. Some dogs barely notice. Others scratch and lick at the spot for hours.

You may sometimes see a dog licking and itching before you have spotted the mosquito bite itself. Most dogs settle down within a few hours, and almost all are back to normal within a day. If your dog is still bothered by a bite after a day, this could be a sign of a secondary infection or a different type of bite.

How do I know if my dog has a mosquito bite?

Your dog may whinge or yelp when it is bitten. After the bite, the area may swell and turn red. If your dog has not been bitten on its paw or head, this is usually all that happens. It may also start scratching and licking the bite.

Symptoms and reactions to mosquito bites in dogs

A dog with a mosquito bite can show a range of symptoms and reactions, depending on the dog's sensitivity. The most common are:

• Red bumps or swelling at the site of the bite
• Itching and scratching at the bite site
• Mild irritation or redness of the skin

More severe symptoms can also occur. These include a rash or lumps that grow larger, excessive licking and biting at the bite site, and skin inflammation caused by scratching. Insect bites in dogs are a recognised worldwide problem, and repeated scratching at the site is one of the main ways a simple bite turns into something worse [1]. Keep an eye on the bite so it doesn't get there.

Can dogs be allergic to mosquitoes?

Some dogs are allergic to mosquitoes. A 2020 veterinary case report documented a dog with a genuine hypersensitivity reaction to mosquito bites, confirmed under controlled conditions, not just a stronger version of the usual itch [2]. Dogs with a true allergy need to see a vet right away. Signs of an allergic reaction include:

• Severe swelling of the muzzle or eyes
• Difficulty breathing
• Extreme tiredness or lethargy
• Anaphylactic shock

Anaphylactic shock is rare. It is also life-threatening. Watch for the symptoms above so you can act fast if your dog turns out to be one of the sensitive ones.

Complications of mosquito bites in dogs

Mosquito bites cause intense itching. That's true for humans, and for dogs too. Make sure your dog doesn't scratch the bite too much, since broken skin invites infection.

Mosquitoes can also carry disease. The best-known in humans is malaria. In dogs, the bigger worry is heartworm, a parasite that settles in the heart and blood vessels and can cause serious, sometimes fatal, disease if untreated. Heartworm used to be thought of as a southern European problem, but research over the past decade shows it spreading north and east, helped by warmer temperatures and pets travelling with their owners [3]. It's still uncommon in much of Northern Europe, but no longer something to rule out automatically. If you travel with your dog, or live somewhere heartworm has been reported, ask your vet about prevention.

What should you do if your dog has a mosquito bite?

Distract him. A bit of play or a walk goes a long way toward stopping the licking and scratching. A cold compress can also help bring down swelling and itching. There are dog-friendly ointments too, such as aloe vera cream or something your vet has approved.

Should I take my dog to the veterinarian if they have a mosquito bite?

If your dog has a severe reaction to the mosquito bite, contact your veterinarian. Call if your dog shows any of the following:

• Severe swelling around the bite
• The bite is oozing pus
• Your dog is having trouble breathing
• The itching is extreme and isn't letting up
• There are signs of infection, such as warmth or redness around the bite

How can I prevent my dog from getting mosquito bites?

A few tricks help keep mosquitoes off your dog. Dog-friendly insect repellents, sprays or drops made specifically for dogs, are the obvious first step. Avoid anything containing DEET. It's a common ingredient in human repellents, and it's toxic to dogs, with reported effects ranging from vomiting and drooling to tremors and seizures at higher exposures [4]. Natural options such as lemongrass oil or lavender oil exist too, but only use these after checking with your veterinarian first.

Insect-repellent collars are another option worth trying. These are coated with an oil that repels mosquitoes.

Conclusion: Do mosquito bites cause itching in dogs too?

Yes. Mosquito bites in dogs are usually harmless but itchy and irritating. Some dogs react more strongly than others, with symptoms ranging from red bumps to, rarely, a severe allergic reaction. Keep an eye on your dog, stop them from scratching the bite open, and call the vet if you see swelling around the muzzle or any breathing trouble.