# Lumps and Growths on Your Dog's Paw: What They Mean

A dog growth on paw can be harmless, such as a collagenous nevus or a callus, or it can be a tumor that needs sampling. The only way to know which one you are dealing with is a veterinary exam, and often a sample of the tissue. Some lumps on the paw are emergencies because dogs use their feet for everything.

This article is educational and is not a substitute for veterinary diagnosis or treatment.

## Quick Answer

- A new lump on the paw pad, between the toes, or on the leg near the paw should be examined by a veterinarian, because paw tumors are common in middle-aged and older dogs [1].
- Benign lumps such as collagenous nevi and fibromas are common in dogs, and surgical removal is often effective when needed [1].
- Puppies' paws do grow and change shape as they mature, but a distinct lump is not part of normal puppy growth.
- Soft tissue sarcomas are malignant tumors of connective tissue that are common in medium to large breeds and older dogs, and they tend to invade locally [2].
- If your dog is limping badly, will not put the paw down, or the lump bleeds or drains, call your veterinarian the same day.

## What a Paw Lump Looks Like and What Is Normal

Dogs' paws take a beating. They walk on concrete, gravel, and every surface in between. A study of dogs housed in commercial breeding facilities found that paw problems were common, including wet paws in 12.6% of dogs, calluses in 11.26%, redness in 6.97%, and matted paw fur in 6.17% [3]. That tells you something useful. Paw changes are frequent, and many of them are related to the surface the dog stands on.

Normal paw anatomy includes the pads, the toenails, the skin between the toes (the interdigital space), and the small bones of the toes. You may feel normal bumps and ridges on the pads. The main pad in the middle of the foot is called the metacarpal or metatarsal pad, and it is naturally thick and slightly uneven. The toes have smaller digital pads. None of these should be new, growing, or painful.

A lump that matters usually has one or more of these features:

- It appeared recently or has gotten bigger.
- It is firm, rubbery, or mushy instead of feeling like normal pad tissue.
- It is hairless, red, ulcerated, or bleeding.
- It sits between the toes or under a toenail.
- Your dog licks it, chews it, or limps on that leg.

Fibromas, for example, feel firm and rubbery or soft and mushy, and they often appear as isolated, raised, hairless lumps that start under the skin surface [1]. Collagenous nevi are flat to raised lumps that can develop in the skin or the fat beneath the skin, and they are most common on the legs, head, and neck [1].

If you are not sure whether a lump is on the skin or deeper, your veterinarian can tell by feel and by sampling it. For a broader look at lumps anywhere on the body, see [Dog Skin Bumps and Lumps: When to See the Vet](/knowledge/veterinary-medicine/vet-visit-decisions/dog-skin-bumps-lumps).

### Do Puppies' Paws Grow?

Yes, puppies' paws grow. The feet of a young dog change size and shape as the bones mature, and the pads thicken as the dog walks on more surfaces. That growth is gradual and symmetric. It affects both front feet or both back feet in a similar way.

A puppy paw growth that is a distinct lump, a swelling on one side only, or a bump that keeps getting bigger is not normal puppy growth. Puppies can get the same skin tumors as adult dogs, though they are less common. Any new lump on a puppy's paw deserves a veterinary look, especially if the puppy limps.

## Main Causes of a Dog Growth on the Paw

The list of possible causes is long. Your veterinarian will narrow it down with an exam and testing. Here are the ones owners ask about most.

| Cause | Typical clues | How urgent |
|---|---|---|
| Collagenous nevus | Flat to raised lump on the leg, head, or neck, common in middle-aged and older dogs, often in areas prone to trauma [1] | Routine visit |
| Fibroma | Isolated, raised, often hairless lump under the skin, firm and rubbery or soft and mushy, most common in aged dogs [1] | Routine visit, sooner if it changes |
| Callus | Thickened, hairless pad over a pressure point, often from hard flooring [3] | Routine visit |
| Interdigital furuncle (cyst between toes) | Swelling and pain between the toes, often with licking | Same-day visit |
| Epidermoid cyst | A cavity filled with keratin, usually in the skin, rarely inside the bone of a toe [4] | Routine to same-day, depending on pain |
| Soft tissue sarcoma | Firm, deep lump with poorly defined margins, common in medium to large breeds and older dogs, can invade locally [2] | Prompt visit, usually within days |
| Mast cell tumor | Skin lump that may wax and wane, can spread to lymph nodes [5] | Prompt visit |
| Bone metastasis from another cancer | Multiple limb lameness and joint swelling, rare [6] | Emergency or same-day |

A few notes on that table. Collagenous nevi and fibromas are benign, and surgical removal is generally effective for both, though some collagenous nevi can grow too large to remove [1]. Fibroma treatment is optional unless the lump changes appearance or grows large, in which case complete surgical removal is recommended [1].

Soft tissue sarcomas are a different story. They have poorly defined margins, which makes them invasive and prone to coming back in the same spot after surgery [2]. They spread to other parts of the body at low rates and respond poorly to chemotherapy [2]. That is why early, wide surgical removal matters.

Mast cell tumors usually start in the skin, but a primary mast cell tumor in a lymph node has been reported in a dog with no skin tumor found [5]. This is rare, and it is mentioned here only to show that not every lump follows the usual pattern.

Bone cancer and cancer that has spread to bone are less common causes of paw swelling and lameness. One report described a dog with multiple limb lameness and joint swelling from a pheochromocytoma that had spread to bones throughout the body [6]. The authors emphasized that this tumor belongs on the list of possibilities when a dog has symptoms like those of a joint disease [6]. Cases like this are uncommon, but they are why a lump plus lameness gets taken seriously.

## Red Flags That Make It an Emergency

Call your veterinarian right away or go to an emergency clinic if you see any of these:

- The paw is swollen, hot, and your dog will not let you touch it.
- Your dog is crying, pacing, or cannot put the foot down at all.
- The lump is bleeding and will not stop.
- The lump burst open or is draining pus or fluid.
- There is a deep cut, a foreign object, or a torn toenail.
- Your dog has a fever, is vomiting, or seems depressed along with the paw problem.
- Multiple limbs are swollen or your dog is lame in more than one leg [6].

Paw pain can escalate fast. A dog that will not bear weight on a leg is not a wait-and-see situation.

## What You Can Safely Do at Home While You Wait

You cannot diagnose a paw lump at home, and you should not try to remove it. Here is what you can do safely.

- Look, do not squeeze. Gently part the fur and check the pad, the spaces between the toes, and the toenails. Squeezing a lump can cause pain, bleeding, or infection.
- Take photos with your phone, including one with a coin or ruler next to the lump for scale. Photos help your veterinarian track change over time.
- Note the date you first saw it and whether it has changed.
- Keep the paw clean and dry. Wet paws were the most common paw finding in one facility study, affecting 12.6% of dogs [3]. Drying the feet after walks and after swimming is a simple habit.
- Prevent licking. A cone or a soft collar can stop your dog from chewing the area raw. Licking can turn a small lump into an open wound.
- Check the floors. Hard, rough, or wet surfaces can contribute to paw problems [3]. Adding a mat or rug in the areas where your dog stands most can reduce pressure and moisture.
- Do not apply human creams, ointments, or bandages without veterinary advice. Many human products are not safe for dogs, and a tight bandage can cut off circulation.

If your dog is licking one paw constantly, that is a reason to book a visit. Persistent licking can be a sign of pain, allergy, or a growth under the fur. See [Dog Licking Paws Cancer](/knowledge/veterinary-medicine/clinical-methods/dog-licking-paws-cancer) for more on that pattern.

## What Your Veterinarian Will Check and Test

Your veterinarian will start with a full physical exam, including all four paws. They will compare the affected paw to the others, feel the lump's size, depth, and mobility, and check the nearby lymph nodes. They will also watch your dog walk.

Next comes sampling. The most common test is a fine needle aspirate. Your veterinarian inserts a thin needle into the lump, collects cells, and looks at them under a microscope. This is quick and usually well tolerated. It can tell the difference between a cyst, a fatty lump, an inflammatory swelling, and some tumors.

Sometimes an aspirate is not enough. Your veterinarian may recommend:

- A tissue biopsy, which removes a piece of the lump for lab analysis.
- X-rays of the paw and chest, especially if a tumor is suspected.
- Blood work before any procedure that requires anesthesia.
- A referral to a veterinary oncologist or surgeon for certain tumors.

The reason sampling matters is that different lumps behave very differently. A cyst can sometimes be monitored. A soft tissue sarcoma needs wide surgical margins because of its poorly defined edges [2]. An epidermoid cyst inside a toe bone is rare, and it has to be told apart from malignant tumors of the digit, which often need more extensive surgery [4]. You cannot make that call by looking.

If the lump is on the paw pad itself, your veterinarian will also check for foreign material, corns, and pressure sores. For a deeper look at paw structure and function, see [Dog Paw](/knowledge/veterinary-medicine/clinical-methods/dog-paw). If the paw is swollen instead of lumpy, [Swollen Dog Paw: Comprehensive Veterinary Reference Guide](/knowledge/veterinary-medicine/preventive-care/swollen-dog-paw) covers that pattern.

### Questions Your Veterinarian May Ask

- When did you first notice the lump?
- Has it changed in size, color, or texture?
- Does your dog lick or chew it?
- Is your dog limping, and if so, when did that start?
- What surfaces does your dog walk and stand on most?
- Has your dog had lumps removed before?

Bring your photos and your notes. They help.

## Prevention and Monitoring

You cannot prevent every lump, but you can catch problems early.

- Do a monthly paw check. Look at each pad, each toenail, and the skin between the toes. Ten seconds per paw is enough.
- Keep nails trimmed. Long nails change how a dog stands and can put extra pressure on the toes.
- Dry the paws after wet walks, baths, and swims [3].
- Watch the flooring. If your dog spends hours on concrete or another hard surface, provide softer areas to rest [3].
- Track any lump you find. Measure it, photograph it, and write down the date. A lump that doubles in size over weeks needs a visit.
- Keep routine wellness visits. Your veterinarian can check the paws at every exam, which is how many early tumors get found.

For lumps on other parts of the body, the same rules apply. [Why Is My Dog having lumps on skin? Lipoma vs Mast Cell vs Cyst Diagnosis](/knowledge/veterinary-medicine/symptom-guides/why-is-my-dog-having-lumps-on-skin-lipoma-vs-mast-cell-vs-cyst-diagnosis) walks through the common skin lumps and how they are told apart.

## Limitations and When to Contact a Veterinarian

No article can tell you what a specific lump is. Only your veterinarian can examine it, sample it, and give you an answer for your dog.

Call for a same-day appointment if your dog has a new paw lump with limping, licking, or redness. Go to an emergency clinic now if your dog will not bear weight on the leg, the paw is severely swollen or bleeding, or your dog seems systemically ill. Book a routine visit if you found a small lump that is not painful and your dog is walking normally, but do not put it off for months. Lumps change.

If you have any doubt, call your veterinarian. A quick exam is far easier than treating an advanced problem later.

## Frequently Asked Questions

### Is a growth on my dog's paw always cancer?

No. Many paw lumps are benign, including collagenous nevi and fibromas, which are common in dogs and often removable with surgery [1]. Cysts and calluses are also common and are not cancer [3][4]. That said, malignant tumors such as soft tissue sarcomas do occur on the limbs, so every new lump should be checked [2].

### Can I just watch a paw lump at home?

You can monitor a lump your veterinarian has already examined and cleared, but a new lump should be checked first. Watching and waiting is risky because some tumors look harmless at the surface while extending deeper into the tissue [2]. If a lump grows, changes texture, bleeds, or causes limping, book a visit right away.

### Why does my dog keep licking one paw?

Constant licking usually means something is irritating or painful, such as a growth, a foreign object, an allergy, or an infection between the toes. Licking can also be a sign of pain deeper in the paw or leg. A veterinary exam is the fastest way to find the cause and get your dog comfortable.

### Are paw tumors in dogs painful?

They can be. Lumps that press on the pad, sit between the toes, or involve the bone often cause limping or licking. Some skin tumors are not painful at all, which is why owners sometimes miss them until the lump is large. Any change in how your dog walks deserves attention.

### Should I have a benign paw lump removed?

It depends on the lump and your dog. Fibroma treatment is optional unless the lump changes appearance or grows large, in which case complete surgical removal is recommended [1]. Collagenous nevi are generally removed effectively with surgery, though some can grow too large to remove [1]. Your veterinarian will weigh the lump's location, your dog's age, and the risks of anesthesia with you.

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## Related Articles

- [Dog Skin Bumps and Lumps: When to See the Vet](/knowledge/veterinary-medicine/vet-visit-decisions/dog-skin-bumps-lumps)
- [Dog Paw](/knowledge/veterinary-medicine/clinical-methods/dog-paw)
- [Why Is My Dog having lumps on skin? Lipoma vs Mast Cell vs Cyst Diagnosis](/knowledge/veterinary-medicine/symptom-guides/why-is-my-dog-having-lumps-on-skin-lipoma-vs-mast-cell-vs-cyst-diagnosis)
- [Dog Licking Paws Cancer](/knowledge/veterinary-medicine/clinical-methods/dog-licking-paws-cancer)
- [Swollen Dog Paw: Comprehensive Veterinary Reference Guide](/knowledge/veterinary-medicine/preventive-care/swollen-dog-paw)
- [Lump Under Dogs Skin: Comprehensive Veterinary Reference Guide](/knowledge/veterinary-medicine/oncology/lump-under-dogs-skin)
- [Lump on Your Dog's Paw or Paw Pad](/knowledge/veterinary-medicine/symptom-guides/dog-paw-pad-lump)
- [Paw Tumors in Dogs: Signs, Types, and Treatment](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/dog-paw-tumor-signs-treatment)
- [Lumps on Your Dog's Legs, Elbows, and Armpits: What They Mean](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/dog-bump-on-leg-elbow-armpit)

## References

1. [Tumors of the Skin in Dogs - Dog Owners](https://www.merckvetmanual.com/dog-owners/skin-disorders-of-dogs/tumors-of-the-skin-in-dogs). Merck Veterinary Manual.
2. [Canine cutaneous and subcutaneous soft tissue sarcoma in dogs: a consensus report from the Brazilian association of veterinary oncology](https://pubmed.ncbi.nlm.nih.gov/42182906/). Frontiers in veterinary science, 2026.
3. [A cross-sectional study to investigate associations between flooring substrates and prevalence of limb and paw abnormalities of dogs housed in commercial breeding facilities](https://pubmed.ncbi.nlm.nih.gov/40046418/). Frontiers in veterinary science, 2025.
4. [Intraosseous epidermoid cyst in the digit of an atopic dog with chronic pododermatitis: case report](https://pubmed.ncbi.nlm.nih.gov/41695825/). Brazilian journal of veterinary medicine, 2026.
5. [Suspected canine primary lymph node mast cell tumor](https://pubmed.ncbi.nlm.nih.gov/41030425/). The Canadian veterinary journal = La revue veterinaire canadienne, 2025.
6. [Osteolytic metastases from a pheochromocytoma presenting as multiple limb lameness and joint swelling in a dog: a case report](https://pubmed.ncbi.nlm.nih.gov/41321567/). Frontiers in veterinary science, 2025.

## Further Reading

- [Merck Veterinary Manual: Dog Owners](https://www.merckvetmanual.com/dog-owners)
- [Cornell Richard P. Riney Canine Health Center: Canine Health Information](https://www.vet.cornell.edu/departments-centers-and-institutes/riney-canine-health-center/canine-health-information)
- [American Veterinary Medical Association: Pet Care](https://www.avma.org/resources-tools/pet-owners/petcare)