When Marcus noticed a pea-sized lump on his Labrador's front paw after a long hike, he assumed it was a pebble stuck in the pad. Three days later, the bump had doubled in size and his dog, Cooper, started limping on gravel. What looked like a minor foot injury turned out to be an interdigital cyst — a common but often misunderstood paw problem.
Key points at a glance
- Paw pad bumps range from harmless calluses and warts to infected cysts and tumors
- Interdigital cysts are the most common cause of swollen bumps between toes
- Limping, licking, bleeding, or rapid growth always warrants a vet visit
- Never squeeze or lance a paw bump at home — you risk deep infection
- Treatment depends on cause and may include antibiotics, soaking, or surgical removal
What causes bumps on dog paw pads?
The paw pad skin is thick but takes constant abuse from hot pavement, ice, chemicals, and rough terrain. Bumps form when tissue is irritated or a gland or hair follicle becomes blocked.
Interdigital cysts (interdigital furuncles) are inflamed nodules between the toes. They often affect bulldogs, Labradors, and shar-peis. Allergies, foreign bodies, and bacterial infection all play a role.
Calluses and hyperkeratosis create hard, raised areas on weight-bearing pads — usually painless and slow-growing.
Warts (papillomas) caused by a virus can appear on paw pads in young dogs. They are small, cauliflower-shaped, and may resolve on their own.
Sebaceous cysts form when a blocked oil gland fills with keratin. They feel round and movable and may rupture, leaking thick white material.
Tumors — both benign and malignant — can develop on or near paw pads. Any lump that grows quickly, bleeds, or changes color needs prompt evaluation.
How can you tell what type of bump it is?
You cannot reliably diagnose a paw lump by appearance alone. Certain patterns help you decide urgency:
| Sign | Likely less urgent | Likely needs vet soon |
|---|---|---|
| Onset | Slow, months | Sudden, days |
| Pain | None, walks normally | Limping, won't bear weight |
| Location | Center of main pad | Between toes |
| Surface | Smooth, hard | Red, ulcerated, draining |
| Growth | Stable size | Enlarging weekly |
What should you do at home before the vet visit?
Keep the paw clean and dry. Trim fur around the area but do not cut into the bump. Use an Elizabethan collar if your dog licks constantly. Warm Epsom salt soaks (one tablespoon per quart, five minutes, twice daily) can help mild inflammation, but skip this if skin is broken. Never use human acne products or steroid creams without veterinary guidance.
Take a photo with a coin for scale and track size daily. Note whether the bump appears after walks on specific surfaces.
What will the vet do?
Your veterinarian will examine the paw, check for foreign bodies, and may perform a fine-needle aspirate. Bacterial culture follows if infection is suspected. Persistent or suspicious lumps may need biopsy.
Simple cysts often respond to antibiotics plus anti-inflammatory medication. Deep or recurring interdigital cysts may require surgical removal. Allergy management — diet change, cytopoint, or apoquel — addresses the root cause when atopic dermatitis drives recurrence.
When is it an emergency?
Seek same-day care if the paw is hot, severely swollen, oozing pus, or if your dog cannot walk. A bump that bleeds spontaneously or appears after a puncture wound also needs immediate attention.
Frequently asked questions
Can interdigital cysts come back after treatment? Yes. Recurrence is common unless underlying allergies or anatomy are addressed.
Are paw pad bumps contagious to other dogs? Viral warts can spread between young dogs. Bacterial cysts and tumors are not contagious.
Should I walk my dog while the bump is healing? Short leash walks on soft grass are usually fine. Avoid hot pavement, salt, and rough trails until your vet clears full activity.
This article is for informational purposes only and does not replace professional veterinary advice. Always consult your veterinarian for diagnosis and treatment of paw lumps or cysts.