# Bump on Your Dog's Paw or Paw Pad: Causes and Care A dog bump on paw or paw pad is a lump you can see or feel on the top of the foot, between the toes, or on the thick cushion your dog walks on. Some are harmless, like cysts or calluses, and some are tumors that need treatment. Because paw lumps can look alike, a veterinarian often needs to examine the tissue to tell them apart. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - A new lump on the paw should be checked by a veterinarian, especially if it is firm, growing, or painful. - Soaking the paw in warm water and keeping it clean can ease mild irritation while you wait for an appointment. - Never squeeze, poke, or try to remove a paw lump at home. - Limping, bleeding, swelling that spreads up the leg, or a lump that grows quickly means call your vet right away. - Many paw lumps are benign, but some tumors and cysts need surgery or other treatment to keep your dog comfortable. ## What a Paw Bump Looks Like and What Is Normal Dog paws take a beating. The pads are thick, hairless cushions, and the top of the paw is covered in skin and short hair. Normal paws feel fairly even. You may notice small rough patches where your dog walks on hot pavement or hard ground, and those often fade with rest. A bump is different. It can be a raised spot on the skin, a firm knot under the surface, or a swelling that makes one toe look bigger than the others. Some lumps sit right on the pad. Others appear on the top of the paw or between the toes. A dog bump on top of paw often gets noticed when you are petting your dog or trimming nails. Swelling is another version of the same problem. A swollen paw may look puffy, feel warm, or be tender when you touch it. Swelling can come from a wound, an infection, an insect sting, or a growth pressing on tissue. It can also be the first sign of a tumor. You know your dog's paws better than anyone. If something feels new or different, write down when you found it and whether it has changed. That history helps your veterinarian. ## Main Causes of a Dog Bump on Paw or Paw Pad Causes range from harmless skin changes to cancer. The table below gives common clues, but only a veterinarian can confirm a diagnosis. | Cause | Typical clues | How urgent | |---|---|---| | Epidermoid cyst | Smooth, round, slow growing, often near a toe or digit, may sit inside bone in rare cases | Routine visit, but needs imaging to rule out tumors [1] | | Calcifying aponeurotic fibroma | Firm, round mass attached to tendon tissue on the paw, may have gritty calcium deposits | Routine to urgent, needs biopsy [2] | | Corn or callus | Hard, rough spot on a pad, painful when walking on hard surfaces | Routine visit, often managed with padding | | Foreign body or splinter | Sudden swelling, licking, a visible wound or draining tract | Same day if deep or infected | | Insect bite or sting | Rapid swelling, redness, itching, often after being outside | Same day if swelling is severe | | Infection or abscess | Warm, painful swelling, pus, fever, limping | Same day | | Tumor (benign or malignant) | Firm lump, fast growth, bleeding, change in shape, pain | Urgent, needs testing | ### Cysts and Benign Growths Epidermoid cysts are non-cancerous pockets lined with skin cells and filled with keratin [1]. They are common in the skin of dogs, but the form that grows inside a toe bone is rare [1]. These cysts must be told apart from malignant tumors of the digit, because tumors often need more extensive surgery [1]. A cyst may feel smooth and round, and it may stay the same size for months. Calcifying aponeurotic fibroma is another rare benign growth. One report described a firm, round mass on the top of a rear paw in a 12-year-old dog [2]. The mass was attached to a tendon and contained scattered calcium deposits [2]. The dog had no recurrence or spread during follow-up [2]. This is a rare diagnosis, but it shows that not every firm paw lump is cancer. ### Corns, Calluses, and Pressure Sores Corns are hard, painful spots that form on paw pads. They are most common on dogs that walk on rough or hot surfaces, and on dogs with uneven weight bearing. A corn can look like a small pebble stuck in the pad. Your dog may limp or lick the paw. Calluses are thicker, less painful areas of skin that form where bone presses against the ground. They are a response to pressure, not a disease. A callus that cracks or bleeds can become infected. ### Infections, Abscesses, and Foreign Bodies A splinter, thorn, or piece of glass can work into the paw and cause swelling. Bacteria then multiply, and an abscess forms. The paw becomes hot, swollen, and painful. Your dog may hold the leg up or refuse to walk. Chronic paw inflammation, called pododermatitis, makes the paw more vulnerable to lumps and cysts. One case report described an intraosseous epidermoid cyst in a dog with atopic dermatitis and chronic pododermatitis [1]. If your dog has ongoing paw allergies, that background matters. See [Dog Paw Allergies: Signs, Causes, and Treatment](/knowledge/veterinary-medicine/preventive-care/dog-paw-allergies) for more on managing the underlying skin disease. ### Tumors Tumors of the paw can be benign or malignant. They may start in the skin, the pad, the bone, or the soft tissue. A malignant tumor often grows quickly, changes shape, and may bleed or ulcerate. Because paw tumors can look like cysts or corns, veterinarians often recommend testing the tissue. A lump that involves bone is a special concern. The rare intraosseous epidermoid cyst must be differentiated from other digital lesions involving bone, particularly malignant tumors [1]. That is why X-rays or advanced imaging are often part of the workup. ### Swelling Without a Clear Lump Sometimes the whole paw swells and you cannot find a single bump. This can happen with allergies, infections, insect bites, or trauma. It can also happen when a mass is deep inside the paw. A swollen paw that does not improve within a day or two deserves a veterinary visit. ## Red Flags That Make It an Emergency Some paw problems cannot wait. Call your veterinarian or an emergency clinic right away if you see any of these: - The swelling is spreading up the leg or the paw is twice its normal size. - Your dog will not put any weight on the leg and is crying or panting. - The lump is bleeding heavily or will not stop oozing. - The paw is hot, red, and very painful to touch. - Your dog has a fever, is vomiting, or seems depressed. - A wound is deep, has a foreign object stuck in it, or exposes bone or tendon. - The lump grew noticeably in a few days. - Your dog is licking the paw constantly and has made it raw. Limping in dogs can come from many systems, including orthopedic, neurologic, infectious, inflammatory, vascular, and neoplastic disorders, and the signs often overlap [3]. A veterinarian can localize the problem with a physical exam and imaging [3]. Delayed diagnosis can affect prognosis and treatment options for some conditions [3]. ## Safe Things You Can Do at Home While Waiting Home care is about comfort and cleanliness, not diagnosis. Do these things while you arrange a veterinary visit. ### Keep the Paw Clean and Dry Rinse the paw with lukewarm water after walks. Pat it dry with a clean towel. Moisture between the toes encourages yeast and bacteria, so dry carefully. ### Soak Mildly Irritated Paws A short soak in warm water can soften a crusty spot and soothe mild irritation. Use a clean bowl and plain warm water. Dry the paw well afterward. Do not add anything to the water unless your veterinarian tells you to. ### Prevent Licking Licking makes almost every paw problem worse. It adds moisture, bacteria, and friction. An Elizabethan collar or a soft cone can break the cycle. A clean sock or bootie can also help, as long as it stays dry and does not rub. ### Check the Environment Hot pavement, salted sidewalks, and rough gravel can irritate paws. Walk your dog on grass or soft ground when possible. In winter, rinse salt off the paws after walks. ### Do Not Do These Things - Do not squeeze, pop, or cut into a lump. - Do not apply human medications, including antibiotic creams or pain relievers, without veterinary advice. Some are toxic to dogs. - Do not try to pull out a deeply embedded foreign object. - Do not wrap the paw so tightly that it cuts off circulation. If your dog is licking and chewing at the paws, that behavior often has an underlying trigger. See [Dog Licking Paws Cause](/knowledge/veterinary-medicine/clinical-methods/dog-licking-paws-cause) and [Dog Licking Paws And Scratching](/knowledge/veterinary-medicine/behavior/dog-licking-paws-and-scratching) for more on why this happens and how to respond. ## What Your Veterinarian Will Check and Test Your veterinarian will start with a full history and a hands-on exam. Expect questions about when you found the lump, how fast it changed, and whether your dog is limping. ### Physical and Orthopedic Examination The vet will watch your dog walk and may ask you to trot your dog. They will feel the paw, the toes, the pads, and the joints. They will check for pain, heat, and range of motion. They will also check the rest of the body for other lumps, because some conditions can appear in more than one place. ### Imaging X-rays are common for paw lumps, especially when bone may be involved. Ultrasound can help evaluate soft tissue. In complex or unresolved cases, veterinarians may use computed tomography, MRI, PET-CT, or arthroscopy [3]. These tools help localize disease and plan treatment [3]. ### Sampling the Lump The most direct way to identify a paw lump is to sample it. Your veterinarian may use a fine needle to collect cells, or they may recommend a biopsy to remove a piece of tissue for microscopic examination. A biopsy is often needed to tell a cyst from a tumor. ### Blood Work and Other Tests Blood work may be recommended before anesthesia or surgery. If infection is suspected, the vet may culture the area. If allergies are part of the picture, they may discuss allergy testing or a diet trial. ### Treatment Depends on the Diagnosis Treatment can range from simple padding and rest to surgery, antibiotics, or referral to a specialist. Benign lumps that are not bothering your dog may only need monitoring. Malignant tumors usually need more aggressive treatment. Your veterinarian will explain the options and the likely outcome for your dog's specific case. ## Prevention and Monitoring You cannot prevent every paw lump, but you can catch problems early. ### Check Paws Weekly Look at all four paws once a week. Spread the toes, look at the pads, and feel for new bumps. Early detection makes treatment easier. ### Keep Nails Trimmed Long nails change how your dog stands and can put extra pressure on the pads. Trim nails regularly or have a groomer or vet do it. ### Protect the Paws Use booties in extreme heat, cold, or on rough terrain. Avoid walking on hot asphalt. Rinse paws after exposure to salt or chemicals. ### Manage Underlying Skin Disease If your dog has allergies or chronic pododermatitis, keeping that condition controlled lowers the risk of secondary lumps and infections. See [Dog Skin Rash on Paws: Causes and Treatment](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/dog-skin-rash-on-paws-causes) for help with paw rashes. ### Track Changes Take a photo of the lump with a ruler next to it. Note the date. Recheck the size every two weeks. Bring your notes and photos to the vet visit. ## Limitations and When to Contact a Veterinarian This article cannot tell you what your dog's lump is. Only a veterinarian can examine the tissue, order tests, and make a diagnosis. Individual cases need a veterinarian. Contact your veterinarian the same day if your dog is limping, licking constantly, or has a paw that is swollen, warm, or painful. Contact an emergency clinic immediately if the swelling is spreading, the lump is bleeding heavily, your dog cannot bear weight, or your dog seems systemically ill. Schedule a routine visit for any new lump that is not painful and not growing fast. Do not wait to see if it goes away on its own. ## Frequently Asked Questions ### Can a paw bump go away on its own? Some mild bumps, like small insect bites or minor calluses, improve with rest and cleaning. Cysts and tumors usually do not disappear without treatment. If a lump is still there after a week or two, have it checked. ### Is a bump on the paw pad always cancer? No. Corns, calluses, cysts, and foreign body reactions are common and not cancer. However, some paw tumors look exactly like harmless lumps, so testing is the only way to be sure. ### Should I pop a lump on my dog's paw? Never pop or squeeze a paw lump. You can introduce infection, cause bleeding, and spread a tumor if one is present. Let your veterinarian decide how to handle it. ### Why is my dog's paw swollen with no visible lump? Swelling without a lump can come from infection, allergies, a bite, trauma, or a mass deep in the paw. Because the cause is not visible, your dog needs an exam and likely imaging to find the source. ### How long can I wait before seeing a vet? If your dog is comfortable, eating, and not limping, a routine visit within a few days is reasonable. If there is pain, limping, bleeding, or rapid growth, go sooner. When in doubt, call your veterinarian and describe what you see. ## Related Articles - [Dog Licking Paws Cause](/knowledge/veterinary-medicine/clinical-methods/dog-licking-paws-cause) - [Dog Skin Rash on Paws: Causes and Treatment](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/dog-skin-rash-on-paws-causes) - [Dog Paw Allergies: Signs, Causes, and Treatment](/knowledge/veterinary-medicine/preventive-care/dog-paw-allergies) - [Dog Scratching Ears And Paws](/knowledge/veterinary-medicine/behavior/dog-scratching-ears-and-paws) - [Dog Licking Paws And Scratching](/knowledge/veterinary-medicine/behavior/dog-licking-paws-and-scratching) - [Dog Hot Spot on Paw: How to Treat and Prevent Licking](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/dog-hot-spot-paw-treatment-prevention) ## References 1. [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. 2. [Calcifying aponeurotic fibroma on the paw in a dog](https://pubmed.ncbi.nlm.nih.gov/35110769/). The Canadian veterinary journal = La revue veterinaire canadienne, 2022. 3. [Diagnosing Thoracic Limb Lameness in Dogs](https://pubmed.ncbi.nlm.nih.gov/42767891/). The Veterinary clinics of North America. Small animal practice, 2026. ## 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)