Posted by Jamie Sinclair
on August 31, 2026
A paw infection happens when bacteria, yeast, or fungi get past your dog's skin barrier — usually because something else (an injury, allergy, or irritation) opened the door first. It's one of the most common reasons behind sore dog paws, especially sore paws between the toes. This guide covers the real causes, how to tell a yeast infection from a bacterial one, what treatment involves, home care that actually helps, and when to see your vet — plus why a dog that keeps licking red, sore paws usually has an allergy underneath.
Written by Jamie Sinclair, who writes about canine health, nutrition, and everyday care for Doggy Dailies — focused on translating veterinary research and real ingredient science into practical, honest guidance UK dog owners can use.
Table of Contents
- What Is a Paw Infection?
- What Causes Paw Infections?
- Which Bug Is Actually Involved?
- Is Your Dog's Breed More at Risk?
- Signs of a Paw Infection
- Yeast vs Bacterial: How to Tell the Difference
- Interdigital Cysts: The Lump Between the Toes
- Treatment Options
- Home Remedies and Home Care: What Actually Helps
- The Allergy Connection
- When to See Your Vet
- Prevention
- FAQ
What Is a Paw Infection?
Your dog's skin normally acts as a tough, waterproof barrier. A paw infection happens when that barrier is irritated, injured, or compromised, letting bacteria, yeast, or fungi — including some that live harmlessly on your dog's skin all the time — overgrow or get into deeper layers where they don't belong. You may also see the term pododermatitis, which simply means inflammation of the skin on the feet. It doesn't always mean there's an infection, but the two frequently go hand in hand, and both can leave paws visibly sore.
What Causes Paw Infections?
- Trauma — anything from a tiny puncture wound or grass seed to a larger cut lets microorganisms in
- Allergies — food, flea, or environmental allergies make paws intensely itchy, and the constant licking and biting damages the paw's protective covering
- Immune suppression — conditions or treatments that weaken the immune system make it harder to fight off infection
- Warm, damp conditions — paws that stay moist (after walks, swimming, or in humid weather) create an ideal environment for yeast overgrowth
- Hormonal conditions — hypothyroidism and Cushing's disease both make skin infections more likely and slower to clear
Which Bug Is Actually Involved?
Bacterial paw infections are most often caused by Staphylococcus pseudintermedius. This isn't some rare invader — a study characterising staphylococci on healthy canine skin found it's actually the dominant species present, making up 48% of staphylococci isolated, including from the interdigital area between the toes. It's usually a secondary opportunist — present on skin all along, but only causing problems once something else compromises the paw's defences. A yeast infection on a dog's paws, meanwhile, is most often caused by Malassezia, another organism that lives harmlessly on skin until conditions let it overgrow — this canine yeast infection on the paws is one of the most common reasons owners notice a musty, "corn chip" smell between the toes.
Is Your Dog's Breed More at Risk?
Some breeds are more prone to a specific type of paw infection called interdigital cysts — a veterinary review of canine pododermatitis found Pekingese, West Highland White Terriers, and Scotch Terriers were significantly predisposed to interdigital cysts, while Border Collies had a notably low incidence. Short-coated, heavy breeds with splayed toes — Bulldogs, Staffies, Labradors — are also over-represented in UK practice, and dogs with thin paw padding and skinny legs, like Greyhounds, are more prone to paw infections generally, since their paws offer less natural cushioning and protection.
Signs of a Paw Infection
- Redness, swelling, or heat in the paw — often with rust-brown staining of the fur from saliva
- Limping or favouring the paw
- Excessive licking, chewing, or biting at one paw
- Discharge or an unusual odour (see below)
- Visible discolouration, crusting or hair loss between the toes
- A lump or blister between the toes (see interdigital cysts)
- Paws that look and feel generally sore or tender to the touch
Yeast vs Bacterial: How to Tell the Difference
| Yeast (Malassezia) | Bacterial (Staph.) | |
|---|---|---|
| Smell | Sweet, musty, "corn chips" | Stronger, sourer |
| Look | Dark brown or black greasy residue between toes; thickened, reddish skin | Yellowish discharge, pustules, crusts, sometimes swelling of a toe |
| Typical trigger | Damp paws, allergy, warm weather | A cut, grass seed or persistent licking |
| Vet treatment | Antifungal wipes/shampoo; oral antifungal if severe | Antibacterial wipes/shampoo; oral antibiotics if deep |
That said, this isn't a reliable way to self-diagnose — many infections involve both, and your vet can confirm the actual cause with a quick skin cytology test (a tape strip looked at under the microscope).
Interdigital Cysts: The Lump Between the Toes
An interdigital cyst (more accurately a furuncle) is a painful, fluid-filled swelling between the toes, usually causing a visibly sore paw between the toes, and it's caused by hairs being driven into the skin where the toes press together — which is why heavy, short-coated dogs get them most. They often burst, scab, and come back. They usually need vet treatment (antibiotics, sometimes weeks of them), and recurrent ones are a strong hint that an allergy or the dog's conformation is the real problem.
Treatment Options
Treatment depends on the underlying cause and severity:
- Topical treatments — medicated wipes, shampoos, or ointments for milder cases; chlorhexidine-based products are the vet standard for both yeast and bacteria
- Oral antibiotics or antifungals — for more widespread or stubborn infections
- Pain relief — if the paw is notably uncomfortable
- Addressing the underlying cause — without this, infections often recur even after successful treatment
If your vet prescribes antibiotics, it's important to complete the full course even once symptoms improve — stopping early is a known driver of antibiotic-resistant infections becoming more common in dogs.
Home Remedies and Home Care: What Actually Helps
- Rinse and dry — rinse paws in lukewarm water after walks and dry thoroughly between the toes; damp is the yeast's best friend
- A dilute antiseptic soak — a few minutes in dilute chlorhexidine (from your vet or pet shop) or, for yeast, a dilute white-vinegar-and-water foot soak, then dry, is a gentle way to treat sore paws on a dog. Skip vinegar on broken or raw skin
- Stop the licking — a soft cone or a paw sock for a few days lets sore skin heal; licking is what keeps most paw infections going
- Take clear photos to track whether it's improving or getting worse
- Avoid human antibiotic ointments not specifically recommended by your vet (misuse contributes to resistance), tea tree oil (toxic to dogs), and hydrogen peroxide on open skin
One myth worth clearing up: unlike oral yeast infections in people, cutting carbs from your dog's diet won't meaningfully affect a skin yeast infection. A good, balanced diet supports overall skin health, but it won't directly starve out yeast on the skin's surface.
The Allergy Connection
If your dog's paws are red, sore, and licked raw more than once or twice a year, the paw isn't the problem — it's where the problem shows. Environmental allergy (atopic dermatitis) classically targets the feet, ears and belly, and in the UK it peaks with pollen in spring and summer and with house-dust mites in winter. Managing the allergy is what stops the cycle: your vet can talk through options from antihistamines to newer targeted treatments, and on the supporting side, omega-3s have the best evidence for skin, with some research linking gut health to allergic skin disease. Our Probiotic Chews combine five probiotic strains with wild Alaskan salmon oil and colostrum for that reason — support alongside allergy management, not a treatment for an infected paw. Our guide to why your dog's skin is so itchy covers the allergy side in full.
When to See Your Vet
See your vet if:
- Home care isn't improving things within a few days
- The infection appears to be spreading or worsening
- There's a lump, blister or swollen toe
- Your dog seems to be in significant pain or won't put the paw down
- You notice a fever, lethargy, or your dog seems generally unwell
- Infections keep recurring, which may point to an underlying allergy or other cause that needs addressing
Prevention
Paw problems aren't limited to skin and infection issues, either — nails can run into trouble too, so it's worth knowing the basics of dog broken nail first aid if you ever notice a cracked, split, or bleeding nail.
- Dry paws thoroughly after walks, swimming, or bathing
- Check paws regularly for cuts, grass seeds, or early signs of irritation — especially after summer walks through long grass
- Keep fur between paw pads trimmed to reduce moisture trapping
- Address underlying allergies with your vet, since unmanaged allergies are a common root cause of recurring paw infections
FAQ
What causes a dog paw infection?
Most often trauma, allergies, or warm/damp conditions that compromise the skin barrier, letting bacteria (commonly Staphylococcus pseudintermedius) or yeast (Malassezia) overgrow.
How do I know if my dog's paw is infected?
Redness, swelling, limping, excessive licking or chewing, discharge, or an unusual odour are the main signs — your vet can confirm the type with a simple skin test.
Why does my dog keep licking its paws until they're red?
Persistent paw licking is most often allergy — environmental or food — and the licking then lets yeast or bacteria in. Treating the infection without managing the allergy means it comes back.
What can I put on my dog's infected paw at home?
A dilute chlorhexidine soak, or a dilute vinegar soak for yeast on unbroken skin, then thorough drying, and a cone or sock to stop licking. Avoid tea tree oil, hydrogen peroxide and human antibiotic creams.
Is a paw infection an emergency?
Not usually, but seek prompt vet care if it's worsening, very painful, spreading, or your dog seems generally unwell.
Are certain breeds more prone to paw infections?
Yes — research has found Pekingese, West Highland White Terriers, and Scotch Terriers are more predisposed to interdigital cysts, and thin-padded breeds like Greyhounds are more prone to paw infections generally.
Can diet cure a yeast infection on my dog's paw?
No — unlike some human yeast infections, cutting carbs doesn't meaningfully affect skin yeast in dogs. A balanced diet supports overall skin health but isn't a direct treatment.
Will paw infections keep coming back?
They can, especially if an underlying cause like an allergy isn't addressed — treating the infection alone without managing the root cause often leads to recurrence.
Why does my dog have sore paws between the toes?
Sore paws between the toes are usually either an interdigital cyst, a yeast or bacterial infection, or ongoing irritation from allergies and licking. The exact cause determines the right treatment, so a vet check is worthwhile if it doesn't settle quickly.
This article is for general information only and isn't a substitute for veterinary advice. If your dog has a paw infection that's worsening, very painful, or not improving with home care, please see your vet.
