Is your dog constantly scratching, biting at their skin, or licking their paws? Occasional itching is normal, but if your pup just can’t seem to stop, it could be a sign of something more serious. Excessive itching and biting can lead to irritated skin, hair loss, and even infections if left untreated. In this post, we’ll walk through the most common reasons dogs itch—and what you can do to help them find relief.
When Is Your Dog Scratching a Problem?
Every dog scratches now and then, but here’s when you should take it seriously:
- Scratching or biting that seems nonstop
- Bald patches or thinning fur
- Red, inflamed, or scabbed skin
- Constant licking (especially paws, belly, or base of the tail)
- Whimpering or restlessness while trying to get comfortable
If you’re noticing one or more of these signs, it’s time to start digging into the cause.
Common Causes of Itching and Scratching
Fleas & Other Parasites
Fleas are one of the most common culprits behind itchy dogs. Even just one flea bite can trigger intense irritation—especially in dogs with flea allergy dermatitis. Other parasites like mites (which cause mange), lice, and ticks can also lead to excessive itching and discomfort.
Allergies
Just like humans, dogs can suffer from allergies to all kinds of things:
- Environmental (pollen, mold, dust mites)
- Food (common allergens include chicken, beef, dairy, soy, wheat)
- Contact (like certain shampoos, grass, or even carpet cleaner)
Allergies often show up as red, itchy skin, ear infections, or constant paw licking. It can take some detective work to pinpoint the trigger.
Dry Skin
Dry weather, over-bathing, harsh shampoos, or poor nutrition can lead to dry, flaky skin. Dogs with dry skin may scratch or bite out of discomfort, especially in colder seasons. Adding omega-3 fatty acids to their diet or using a moisturizing, vet-approved shampoo can often help.
Skin Infections
Bacterial and yeast infections can develop when your dog’s skin is irritated or damaged. These infections often show up as red, moist, or crusty areas with an unpleasant odor. Dogs may scratch at the spot, lick it excessively, or seem generally uncomfortable. Infections typically require veterinary treatment, including antibiotics or antifungal medications.
Hot Spots
Hot spots, or acute moist dermatitis, are inflamed areas of skin that develop quickly and worsen with licking or biting. They can be caused by anything from allergies to insect bites and are made worse by moisture trapped under the fur. Hot spots often require shaving the area and applying a medicated ointment to promote healing.
Hormonal Imbalances or Underlying Conditions
Sometimes, excessive itching is a symptom of something more complex. Hormonal conditions like hypothyroidism or Cushing’s disease can cause skin issues, including thinning fur, flaking, or persistent irritation. If no other cause is obvious, your vet may recommend bloodwork to rule out systemic issues.
What You Can Do at Home
There are a few at-home remedies that may help, depending on the cause:
- Use a vet-recommended flea treatment or prevention plan
- Bathe with gentle, hypoallergenic shampoos made for dogs
- Switch to a limited-ingredient or hypoallergenic diet if food allergies are suspected
- Supplement with omega-3s to support skin and coat health
- Keep your dog well-groomed and their environment clean
When to See the Vet
Some cases go beyond what home care can handle. Visit your vet if:
- Your dog shows signs of infection (oozing, sores, swelling)
- Scratching has gone on for more than a week without relief
- You notice major hair loss, bleeding, or behavior changes
- Your dog seems in pain or constantly agitated
A veterinarian can help identify the underlying issue and prescribe the right course of treatment, whether that’s medication, allergy testing, or something else.
Final Thoughts
Itching and scratching are common dog behaviors, but they shouldn’t be constant. Whether it’s fleas, allergies, dry skin, or something more serious, the first step is figuring out the cause. Once you know what’s going on, you can take steps to help your dog feel comfortable again.