Why is my dog itching?
Most itching in dogs comes down to one of a handful of common causes: parasites such as fleas or mites, an allergy to something in the diet or the environment, dry or irritated skin, or occasionally a skin infection sitting on top of one of those. Working out which one is affecting your dog usually needs a vet's examination rather than a guess, but knowing the usual suspects helps you describe what you are seeing.
You might also want to browse dog grooming brushes and durable dog toys.
Fleas and other parasites
Fleas are the most common cause of sudden, intense scratching, particularly around the base of the tail, the belly, and behind the ears. Some dogs have a flea allergy on top of the bites themselves, so a handful of fleas can trigger scratching well out of proportion to how many you can actually find on the coat.
Mites, including the kind that cause mange, and ticks can also cause itching and skin irritation, usually in a more localised patch than the widespread scratching fleas tend to cause. A vet can check for these with a simple skin scrape or a close look at the coat, which is not something that is reliable to try and diagnose from home.
Food and environmental allergies
Allergies in dogs usually show up as itchy skin rather than the sneezing and streaming eyes people associate with hay fever. A food allergy tends to cause year-round itching, often around the ears, paws, and belly, while an environmental allergy to pollen, dust mites, or grass often gets noticeably worse at certain times of year.
Working out which food or environmental trigger is responsible is a slow process of elimination that a vet guides, usually starting with ruling out parasites first since they are more common and easier to rule in or out quickly.
Dry skin and irritation
Dry, flaky skin can itch on its own, particularly in winter when indoor heating dries the air, or after frequent bathing with the wrong shampoo strips natural oils from the coat. This tends to look like general scratching and mild flaking rather than the redness and hot spots an allergy or infection can cause.
Switching to a gentler, dog-specific shampoo and bathing less often is often enough to settle mild dry skin, though anything that does not improve within a week or two is worth mentioning to a vet rather than working through shampoos indefinitely.
When to see a vet
Get your dog checked if the scratching is constant rather than occasional, if you can see broken skin, redness, hair loss, or scabs, or if there is a smell coming from the skin, since that combination often points to an infection that needs treatment rather than a shampoo change.
It is also worth a visit if the itching has come on suddenly and does not settle within a few days, or if your dog is losing sleep over it, because working out the actual cause early is usually quicker and less frustrating than several rounds of guessing at home.
Common questions
- Can I give my dog anything for itching before seeing a vet?
- A vet-approved anti-itch shampoo or a soothing rinse for mild, short-term irritation is reasonable, but anything stronger, including tablets meant for people, should not be given without checking with a vet first, since some common medications are unsafe for dogs.
- Why does my dog scratch more at night?
- Itching often feels worse when a dog is settled and not distracted by activity, which is why scratching seems to ramp up in the evening and overnight. It does not usually mean the underlying cause is different, just that there is less to take their mind off it.
- Can stress make a dog itch?
- Yes, some dogs scratch, lick, or chew as a stress response even without an underlying skin problem, similar to how some people bite their nails when anxious. It is worth mentioning any recent change in routine or environment to your vet alongside the physical symptoms.
- Is it normal for dogs to scratch a little every day?
- A small amount of occasional scratching is normal, the same as a person occasionally scratching an itch. What is worth watching for is a change from your dog's usual amount, or scratching that is frequent enough to cause hair loss or broken skin.
Related
Sources
Written against guidance published by UK veterinary and welfare organisations. Always confirm specifics with your own vet.
Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.