Why Is My Dog Scratching So Much?

Call your vet now if

• Your dog is scratching, biting or licking so much that the skin is raw, bleeding or weeping
• A patch of skin has become hot, red, moist and painful very quickly
• There is sudden swelling of the face, eyes or muzzle, or hives across the body
• Your dog seems unwell as well as itchy — lethargic, off their food, or vomiting
• Your dog has been treated with a product meant for another species, or with too much of a product, and seems unwell
• Your dog is shaking their head violently, holding their head tilted, or has a swollen ear flap

A little scratching is normal

All dogs scratch now and then, just as we do. A quick scratch after waking up or a roll on the grass is not a cause for concern. What matters is a change: scratching more often, for longer, at the same spot, or to the point where it interrupts sleep, play or meals. If you have noticed your dog scratching more than usual, it is worth working through the likely causes.

Start with fleas

Fleas are by far the most common reason for an itchy dog, and you will not always see them. Some dogs are sensitive to flea saliva, so even one or two bites can set off a lot of scratching.

To check:

• Part the fur along your dog's back, especially just in front of the tail, and on the belly.
• Look for tiny dark brown insects moving quickly, or for small black specks.
• Comb some of those specks onto a damp piece of white kitchen paper. If they spread into reddish-brown smudges, that is flea dirt, which is digested blood.
• Check your dog's bedding, your sofa and rugs for the same specks.

If you find fleas, remember that most of the population lives in the home rather than on the pet, as eggs and larvae in carpets and bedding. Treating every dog and cat in the household with a suitable product, washing bedding on a hot cycle and vacuuming regularly all help. Your vet can advise on an effective treatment plan. Our guide to fleas, ticks and worms explains more about prevention.

Never use a product on the wrong species

This is important. Flea and parasite products are made for a specific species and weight range. Some products for dogs contain ingredients that are highly toxic to cats, and cats can become seriously ill just from close contact with a recently treated dog. Equally, cat products are not designed for dogs. Always read the label, use the right product for the right animal and size, and ask your vet or pharmacist if you are unsure. If a cat has been exposed to a dog product, call your vet straight away.

Other parasites

Fleas are not the only culprits. Mites can cause intense itching, sometimes with crusting, scaling or hair loss, and some are contagious to other pets and occasionally to people. Ear mites cause ear scratching and dark, crumbly debris in the ears. Lice and ticks can also cause irritation. These are not always easy to spot at home, so your vet may need to examine your dog and take samples to find out what is going on.

Allergies

Allergies are another common reason for long-term itching. Dogs can react to things in the environment, such as pollen, dust mites and moulds, or less commonly to something in their food. Allergic itching often affects the paws, face, ears, armpits, belly and the area under the tail. You might notice your dog licking or chewing their feet, rubbing their face along the carpet, or having repeated ear problems.

Allergies can be seasonal or year-round, and they tend to need long-term management rather than a quick fix. Please do not change your dog's diet repeatedly to test for food allergies without guidance, as a proper food trial needs careful planning with your vet to give a clear answer.

Dry skin and grooming

Dry, flaky skin can be itchy, particularly in winter when central heating dries the air. Bathing too often, or with human shampoo, can strip the coat of its natural oils. A good brushing routine helps spread those oils and lets you check the skin regularly. See our guide to grooming basics for practical tips. If your dog has a lot of dandruff, a greasy coat or a strong smell, mention it to your vet, as these can point to an underlying skin problem.

Licking from boredom or anxiety

Some dogs lick or chew at themselves when they are bored, stressed or anxious, much as some people bite their nails. This often targets the front legs or paws and can lead to sore, hairless patches. It may be worse when your dog is left alone or when there are changes at home. Even when stress is involved, it is still worth a vet check, because itchy skin and anxiety can feed into each other. More exercise, enrichment and a predictable routine can help.

Signs that need a closer look

Book an appointment with your vet if you notice:

• Red, inflamed or bumpy skin
• Hair loss or thinning patches
• Scabs, sores, crusts or broken skin
• A greasy coat, strong smell or discharge
• Darkening or thickening of the skin
• Scratching at the ears, head shaking, or redness or discharge in the ears
• Licking or chewing at the feet so much that the fur is stained
• Itching that continues even after flea treatment

Ear problems in particular should not be left. They can be uncomfortable and tend to get worse without the right treatment.

Keeping a record

Itching often comes and goes, and it can be hard to remember when it started or what made it worse. Note when you see it, which areas your dog targets, any recent changes in food, products, routine or season, and when parasite treatments were last given. Photos of any skin changes are useful too. Logging these details in Petopedia helps you give your vet a clear picture, which can make it easier to find the cause.

The key takeaway

Check for fleas first and keep parasite prevention up to date for every pet in the home, using the correct product for each species. If the itching is severe, keeps returning, or comes with skin or ear changes, book a vet visit. You do not need to wait until your dog is miserable before asking for help.