Every dog has a scratch now and then. But when the scratching doesn't stop, or it's keeping you both up at night, you'll want to get to the bottom of it.
Itchy skin is one of the most common reasons dogs are taken to the vet in the UK, and it can be caused by anything from a stray flea to an environmental sensitivity. Most causes are very treatable once you know what you're dealing with.
This guide covers the most likely reasons your dog is itching, what the itch's location can tell you, how seasons play a role, and when it's time to get your vet involved.
Is It Normal for Dogs to Scratch?
A bit of scratching here and there is perfectly normal. Dogs scratch for the same sorts of reasons we do: a passing itch, a tickle, a bit of dust in the fur. It becomes a concern only when it happens often or causes visible changes.
If your dog is scratching, licking, or nibbling at themselves more than a handful of times a day, or if you're noticing hair loss, redness, broken skin, or a smell, that's worth looking into.
Some dogs scratch and lick when nobody's watching, too. Saliva staining, where the fur turns a rusty brown colour from repeated licking, can be a clue that your dog has been at it more than you've seen.
The Most Common Reasons Dogs Itch
Fleas and Parasites
Still the number one cause, even when you can't see them. A single flea bite can trigger an intense reaction in dogs with flea allergy dermatitis (FAD). The flea's saliva sets off a hypersensitivity response, and the itching can last for days after just one bite.
Other parasites like mites (which cause mange) and lice can also be behind persistent scratching, particularly around the ears, belly, and legs.
Environmental Sensitivities
Pollen, dust mites, mould spores, and grass are among the most common triggers. It's estimated that at least 10% of dogs in the UK are affected by atopic dermatitis, where the immune system overreacts to things in the environment that wouldn't normally cause a problem. These sensitivities often start between the ages of one and three, and they can be seasonal at first before becoming year-round.
Food Sensitivities
Typically, rare and a lot less common than environmental triggers, but still a possibility. Some dogs develop sensitivities to certain proteins or ingredients in their food over time. Proteins like beef, dairy, and chicken are among those linked to food sensitivities in dogs, though any ingredient can potentially be involved. Food-related itching tends to be non-seasonal and often shows up around the face, ears, paws, and rear end.
Skin Infections
Bacterial and yeast infections often crop up when the skin has already been damaged by scratching or licking, which makes it easier for bacteria and yeast to build up. Yeast infections tend to produce a musty, yeasty smell and often affect the ears, paws, and skin folds.
Contact Dermatitis and Dry Skin
Sometimes the culprit is something your dog has physically touched, a new cleaning product, a washing powder, or certain plants in the garden. Central heating in winter, too-frequent bathing, or a diet low in essential fatty acids can also leave the skin dry, flaky, and itchy.
Where Your Dog Is Itching Can Tell You a Lot
Paying attention to where your dog is scratching can help narrow things down. Different causes tend to show up in different places.
Ears: Persistent ear scratching or head shaking often points to an ear infection or mites. Dogs with floppy ears are especially prone, because the warm, enclosed space makes it easier for bacteria and yeast to take hold.
Paws: Constant licking or chewing at the paws often suggests environmental sensitivities. Pollen and grass allergens collect on the paws during walks and can irritate for a long time after you've come home.
Belly and underside:If your dog is itchy around the belly, groin or inner legs, it could be contact dermatitis from something they’ve come into contact with, like grass or bedding.
Base of the tail: A classic sign of flea allergy dermatitis. Dogs with FAD tend to scratch, bite, and chew around the tail base, lower back, and rear legs, often causing hair loss and red, broken skin.
Face and muzzle: Itching around the face can be associated with food sensitivities, though it's not always the case.
This isn't a diagnostic tool, but it gives you and your vet a useful starting point.
Seasonal Itching: Why It Gets Worse at Certain Times of Year
If your dog's itching comes and goes with the seasons, that's a strong indicator of environmental sensitivities.
Spring: Tree and grass pollen are the main triggers. Dogs may come home from walks scratching at their paws and belly.
Summer: Grass pollen peaks and insect bites become more frequent. Grass seeds can also work their way into paws and ears, causing sharp, focused irritation.
Autumn: Mould spores are the big ones. Damp leaves, wet grass, and mould around the house can all set off a reaction. The part of the UK your dog lives in affects when symptoms appear.
Winter: Less pollen about, but dust mites peak indoors as houses are sealed up and the heating goes on. Dry skin from central heating is another common winter complaint.
Wiping your dog's paws and belly after walks can help reduce what they bring back inside, particularly on high-pollen days.
My Dog Has No Fleas but Is Still Itching
This is one of the most common frustrations dog owners have. Here's what else could be going on.
A dog with flea allergy dermatitis (FAD) can react to a single bite, and the flea doesn't need to still be on your dog for the itching to continue. Even in multi-pet homes, some dogs react far more severely than others, so the absence of visible fleas doesn't rule it out.
Atopic dermatitis is another common cause, and it can look a lot like flea problems. The difference is usually in the pattern, paws, ears, and face tend to be more affected than the tail base.
Yeast or bacterial infections can also keep the itch cycle going long after the original trigger has been dealt with. Mange, caused by mites that burrow into the skin, is another possibility, particularly if the itching is intense and spreading.
Hormonal conditions like hypothyroidism and Cushing's disease can affect the skin too. Hair loss (often symmetrical), a dull coat, and slow-healing skin are common signs. They don't always cause intense itching on their own, but they can make the skin more vulnerable to infections that do.
Some dogs also lick and chew at themselves out of anxiety or boredom, which is more behavioural than skin-related but can still cause real damage over time.
Can Diet Have an Influence on Your Dog's Skin?
It can. A diet that's low in essential fatty acids, or one that doesn't agree with your dog, may contribute to dry or irritated skin over time.
Omega-3 fatty acids help support the skin's natural barrier and may help take some of the heat out of irritated skin. Fish-based recipes tend to be naturally higher in omega-3s, which is one reason they're often suggested for dogs with sensitive skin.
If you suspect food might be playing a role, talk to your vet about an elimination diet. This means feeding a single novel protein for eight to twelve weeks under vet guidance to see if things improve. Over-the-counter food sensitivity tests aren't considered reliable.
At Harringtons, our recipes are made with named meat or fish ingredients and no artificial colours, flavours, or preservatives. Our salmon-based dry food is a popular fish-based option, and our Just 6 recipes use a limited number of ingredients, which can make it easier to work out what agrees with your dog.
How to Help an Itchy Dog at Home
Check for fleas properly. Run a flea comb through the coat, especially around the tail base, neck, and belly. Put any dark specks on a damp white kitchen roll. If they turn reddish-brown, that's flea dirt.
Keep up with parasite prevention year-round, even if you haven't seen fleas.
Wash bedding regularly on a hot cycle to reduce dust mites, pollen, and flea eggs.
Wipe down after walks. Paws, belly, and legs with a damp cloth.
Don't over-bathe. Too-frequent bathing strips natural oils and can make things worse. Stick to a gentle, unscented dog shampoo when needed.
Look at what's changed. New washing powder, cleaning product, or bed? Sometimes removing the trigger is all it takes.
When to Take Your Dog to the Vet
Home care goes a long way for mild cases, but book an appointment if:
-
The itching has been going on for more than a week or two and isn't improving
-
There's hair loss, redness, or broken skin
-
The skin smells unusual or there's any discharge
-
Your dog seems uncomfortable, restless, or off their food
-
You notice swelling, particularly around the face or eyes
-
The scratching came on very suddenly
Your vet will likely start with a physical examination and may do a skin scrape, swab, or hair pluck to check for infections or parasites. If a sensitivity is suspected, they might recommend allergy testing or an elimination diet.
A quick chat with your vet can help put your mind at ease, even if it turns out to be something straightforward.
Which Breeds Are More Prone to Itchy Skin?
Any dog can develop itchy skin, but some breeds are more susceptible.
-
Labrador Retrievers are one of the breeds most commonly affected by atopic dermatitis. They're outdoors a lot, which means more contact with the things that set skin off.
-
West Highland White Terriers are particularly well-known for skin issues, with some estimates suggesting up to 25% of Westies may be affected by allergic skin disease.
-
English and French Bulldogs have skin folds where yeast and bacteria build up easily.
-
Cocker Spaniels are frequently seen for ear infections and skin irritation.
-
German Shepherds and Golden Retrievers also appear on most lists.
None of this means your dog will definitely have problems, but it does mean you'll spot the early signs quicker.
How to Help Prevent Itchy Skin
Stay on top of parasite treatment year-round. It's one of the most effective things you can do.
Feed a balanced diet with omega-3s. Our Superfoods Salmon recipe includes omega-rich fish ingredients alongside added botanicals.
Groom regularly. Brushing removes loose fur, dander, and anything picked up on walks. It's also a chance to check for skin changes.
Wash bedding fortnightly on a hot cycle to keep dust mites and pollen under control.
Avoid known triggers where possible, and get into the habit of running your hands over your dog's coat each week so you notice changes early.
FAQs
Why is my dog itching so much but has no fleas?
Environmental sensitivities, food intolerances, skin infections, dry skin, and hormonal conditions can all cause persistent itching without fleas. If it doesn't settle within a week or two, a quick chat with your vet can help put your mind at ease.
How can I tell if my dog's itching is caused by a food sensitivity?
Food-related itching tends to be non-seasonal and often affects the face, ears, paws, and rear end. The only reliable way to confirm it is through a vet-supervised elimination diet lasting eight to twelve weeks.
When should I worry about my dog scratching?
When it's frequent, intense, or causing hair loss, redness, broken skin, or a smell. If your dog seems distressed or its condition is getting worse, book a vet appointment.
Can I give my dog antihistamines for itching?
Some antihistamines can be used in dogs, but dosage and type differ from what's safe for humans. Always check with your vet first.
Does bathing help an itchy dog?
A gentle, dog-specific shampoo can soothe irritated skin and wash away surface allergens. But bathing too often strips the skin's natural oils and can make things worse.
