Dog Licking Paws Constantly: Causes and What to Do

A dog occasionally licking their paws is normal grooming. A dog that licks their paws for hours, leaving them wet, red or raw, is telling you something. Paws are one of the most telling diagnostic areas of the canine body.

The Most Common Causes

1. Allergies — the Most Frequent Culprit

In dogs, allergies manifest primarily on the skin and paws — not as sneezing like in humans.

• Food allergy: Commonly chicken, beef, wheat or soy. Occurs year-round regardless of season.
• Environmental allergy (atopy): Pollen, dust mites, mould. Often seasonal or worsening in spring and summer. Pale paws develop a reddish-brown stain from porphyrin in the saliva.

2. Pododermatitis (Paw Infection)

Chronic licking creates a warm, moist environment between the toes — perfect for bacteria and yeast (especially Malassezia). The paws smell musty, look swollen, red and crusty. Licking worsens the infection which triggers more licking: a classic vicious cycle.

3. Foreign Body

A thorn, splinter, grass seed or piece of gravel embedded between the toes or in the pad. The licking is typically very localized — one paw, sometimes one specific toe.

4. Paw Pad Injury

Cuts from glass, burns from hot pavement, or damage from road salt in winter. When licking starts suddenly and is confined to one paw: inspect the pads carefully.

5. Anxiety or Stress

Compulsive licking can be a self-soothing behavior in anxious dogs. Look for accompanying signs: separation anxiety, destructiveness, clingy behavior, excessive barking.

6. Musculoskeletal Pain

A dog with wrist (carpal) arthritis may lick that joint seeking relief. If licking is focused on a specific joint, check for lameness and stiffness.

What the Reddish-Brown Staining Means

The rust-coloured staining on light-coloured paws isn't dirt — it's porphyrin, a pigment in saliva that oxidizes and stains hair. It's a reliable indicator of chronic, long-term licking in that area.

What You Can Do at Home

1. Inspect the paws carefully: between toes, pads, nails. Look for foreign bodies, swelling, cuts or redness.
2. Rinse paws after walks: warm water removes pollen, pesticides and irritants that accumulate in the fur.
3. Dry thoroughly: moisture between toes promotes yeast and bacterial growth.
4. Temporary protection: dog boots or a soft cone can interrupt the lick-infection cycle if there's an active wound.
5. Keep a symptom log: when is it worst? After certain foods? In certain seasons? Outdoors only? Log it in Purzi to present to the vet.

When to See the Vet

• Paws are swollen, malodorous, oozing or crusted
• Licking has been going on for 2–3+ weeks without improvement
• There's hair loss at the licked site
• The dog is also limping
• You suspect food allergy (an elimination diet needs vet guidance)

What the Vet Will Do

Cytology from the skin between the toes confirms infection type. Treatment may include:

• Antifungal or antibiotic therapy
• 8–12 week elimination diet for food allergy
• Apoquel (oclacitinib) or Cytopoint for atopy
• Intradermal allergy testing for recurring cases