While it may not seem like a big deal for your pup to stop and give a good scratch behind their ears, frequent or intense scratching can be a sign of something that needs attention. It can also make an existing problem worse.

If your dog is constantly scratching, biting, or licking themselves, here are the most common reasons why and what you can do about it.

Common Reasons Dogs Scratch and Bite Themselves

Fleas and Ticks

Fleas and ticks are one of the most common causes of scratching in dogs. Flea saliva is highly irritating, and a single flea bite can trigger a reaction called flea allergy dermatitis, causing intense itching well beyond the bite site. Ticks work similarly, creating inflammation at the point of entry that can worsen the longer they stay attached.

One way to check for fleas is to look for flea dirt, which looks like small black specks in your dog's fur. Place some on a wet paper towel, and if it turns reddish-brown, it's digested blood, a clear sign of fleas.

Talk to your vet about the right flea and tick preventive for your dog, whether that's a topical treatment, an oral medication, or a collar.

Mange

Mites are microscopic insects that burrow into your dog's coat and feed on skin and blood. This causes significant irritation and leads to intense scratching, hair loss, scabs, and skin lesions. Mange tends to show up most around the armpits, groin, ears, and areas with thinner hair.

If you notice patchy hair loss or crusty skin, contact your vet. Mange is treatable, but it does require professional care.

Allergies

Dogs can develop allergies to environmental triggers like pollen, grass, mold, and dust mites, as well as to certain foods. Seasonal allergies can flare up in spring, summer, or fall, and in warmer climates, they can be a year-round issue.

Signs your dog may have allergies:

Red or inflamed skin
Excessive paw licking
Recurring ear infections
Itching that gets worse at certain times of year or after eating a new food

If you suspect allergies, keep a note of when symptoms appear and what might have changed in your dog's environment or diet. Your vet can run tests and recommend a treatment plan.

Dry Skin

Dry skin is a common but often overlooked cause of scratching. It can be triggered by low humidity, frequent bathing with harsh shampoos, or a diet lacking in essential fatty acids. Dogs with dry skin may also have a dull coat or visible flaking.

Adding omega-3 fatty acids to your dog's diet through food or supplements can support skin health and reduce dryness. Ask your vet before adding anything new to their routine.

Skin Infections

Bacterial and fungal infections often develop as a secondary issue after a dog has been scratching for a while. Broken or irritated skin creates an opening for bacteria or yeast to take hold.

Signs of a skin infection include:

Redness, swelling, or pustules
A foul smell coming from the skin or ears
Hot spots or areas of moist, irritated skin

These infections won't clear up on their own and need veterinary treatment.

Stress or Anxiety

Sometimes, scratching has nothing to do with the skin at all. Dogs experiencing stress, anxiety, or boredom can develop compulsive grooming behaviors, including repetitive scratching, licking, or chewing. This is sometimes called psychogenic itching.

If your dog's scratching seems tied to changes in routine, separation, or a lack of activity, it may be behavioral. Regular exercise, mental stimulation, and a consistent routine can help. If the behavior is severe, your vet or a behavioral specialist can offer guidance.

How to Help a Scratching Dog at Home

While your vet is the right person to diagnose the root cause, a few simple steps can help in the meantime:

Check for fleas using a fine-tooth comb, focusing on the base of the tail, belly, and armpits
Wipe down paws after walks to remove pollen, grass, and other outdoor allergens
Use a gentle, soap-free shampoo with oatmeal to soothe irritated skin, but avoid over-bathing, which can dry skin out further
Review your dog's diet and consider whether a recent food change could be a factor
Add omega-3 supplements to support coat and skin health, with your vet's approval

When to See a Vet About Your Dog’s Scratching

Occasional scratching is completely normal. But if your dog is scratching constantly or more aggressively than usual, it's worth having them checked by a vet.

Some dogs scratch so hard they break their skin, which leaves them uncomfortable and more vulnerable to infection.

Contact your vet if you notice:

Open sores, scabs, or bald patches
A foul odor from the skin or ears
Scratching that is disrupting your dog's sleep or daily activity
No improvement after trying basic home remedies

The sooner you identify the cause, the easier it is to treat.

Keep Your Pup Happy and Healthy at Camp Bow Wow®

We know how much you care about your dog's health and comfort, and we take that seriously too. At Camp Bow Wow, every dog that walks through our doors must be flea and tick-free and up to date on vaccinations, so your pup can play, socialize, and have a great time in a safe, clean environment.

Whether your dog needs a fun day at daycare or a comfortable place to board while you're away, our Certified Camp Counselors are here to give them all the love and attention they deserve. Find your local Camp Bow Wow and book your dog's stay today.

Why Your Dog Is Constantly Scratching and Biting

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