Get

In Your Inbox

Dogster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

What Is This Lump On My Dog’s Stomach? 6 Vet Reviewed Causes & Advice

close up dog with skin lump

Finding a lump on your dog can be just as scary as finding one on you! If you see a bulge of any kind on our dog’s tummy, you have the right to be concerned. Cancer is a huge killer among dogs and often isn’t detected until it is very advanced.

However, the lump could be something as simple as a cyst or a fatty tumor. In this article, we aim to describe in detail what each thing will visually look like to see if it is comparable.

Did you know that you can speak with a real vet online about your dog’s health?

The 6 Possible Causes for Lumps on Your Dog’s Stomach

Getting to the bottom of what’s wrong with your dog is hot on the list. While seeing your vet is definitely in the cards, you probably also want to get a good idea of what might be wrong. Here are a few possible causes.

1. Skin Tag

Skin tags might be alarming at first, but they are totally benign. Small flaps of flesh-colored skin grow on a dog’s skin. They can most likely develop skin tags on the chest, armpits, hips, ankles, elbows, or face.

But the abdomen is one of the most noticeable areas. Generally, skin types might be unsightly, but they are totally harmless and are not a cause for emergency. They generally require no treatment.

Vet pointing out lump on dog stomach
This large, inflamed swelling could be an abscess, tumor, or hernia | Image Credit: Elena11, Shutterstock

2. Cyst

In most cases, cysts develop from hair follicle structures. They are generally by themselves and can be soft or firm. Typically, sebaceous cysts are caused by the buildup of debris in the hair follicle. Depending on the symptoms, your vet might leave the cyst—or they might surgically remove or drain the cyst if they think it’s necessary.


3. Cutaneous Histiocytoma

Cutaneous histiocytoma is a generally benign, rapid-growing tumor typically affecting younger adult dogs. This type of tumor usually comes on very quickly and may alternate or become inflamed and infected.

Often, they spontaneously regress without any treatment, but some of them do require antibiotics or surgical removal.


4. Wart

Dog warts are called canine papillomavirus and can spread very quickly. You might notice it as one small bump, and then all at once, that area is taken over. Your pup can develop warts in several areas of the body, including the belly.

Warts have a very noticeable appearance, looking like cauliflower. Usually, this is caused by this area having a bunch of warts that are grouped together.

If you notice warts on your dog’s stomach, you can likely find them on other more obvious places of the body, including the lips and between toes on paw pads. Dogs under 2 years old are specifically susceptible to warts, although contact can affect dogs of any age.

Cocker Spaniel Dog Breed with papilloma virus infection
A wart or papilloma | Image Credit: Todorean-Gabriel, Shutterstock

5. Lipoma

It might surprise you, but lipomas, or fatty tumors, are pretty common on dogs. They usually pop up between middle age and seniorhood and appear as painless, soft, pliable lumps of fat cells.

Often, these are found on the abdomen and account for most cases of abdominal lumps. In some cases, dogs can develop infiltrative lipomas, which are usually firm, fixed, soft, or mobile and are usually locally aggressive, spreading to surrounding tissues between muscle layers.

Usually, lipomas are harmless, and vets will often recommend leaving them alone. They will generally only intervene if it is causing general discomfort.


6. Hernia

If the lump seems to originate from inside of the dog, it could be a hernia. Abdominal hernias occur when a portion of an abdominal organ protrudes through the abdominal wall. Umbilical hernias occur when a dog’s umbilicus (or belly button) doesn’t close all the way after birth and part of the abdominal tissue protrudes through it.

Hernias may or may not cause pain, discomfort, or other symptoms. Some hernias require surgery to prevent them from coming back if they are large or are causing your dog problems.

If you’re concerned about your pet’s health, you should contact a vet.

If you are worried or want some professional advice, head over to PangoVet. It's an online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content Savings Sale

Assess the Visuals

If you notice a lump on your dog’s stomach, assessing what you’re seeing is important. This little bump could be completely asymptomatic and be no cause for concern. You might have just noticed it when you were rubbing their tummy while they were sitting next to you on the couch.

However, other times it might be red, swollen, irritated, oozing, firm, and a number of other descriptions. Here are some things to look for when assessing the lump on your dog’s stomach.

Color

Color can tell you a lot about whether or not this bump is irritated. If the bump is skin-colored and it doesn’t look very angry, it doesn’t often signal infection, but it could mean it’s a sign of a growth or other issue.

Consistency

What is the consistency of the lump? Is it movable and pliable or rigid and stiff? Is the bump squishy, or is it hard to the touch? Hard, rigid, or firm signal possible malignancy, while soft bumps are usually benign.

Veterinarian holds a dog in his hands and touches his stomach
Image Credit: Alice Rodnova, Shutterstock

Texture

The texture of the lump can tell you a lot about it. If it is extremely firm and rigid but otherwise immovable, it might be fixed. If it is squishy or moves with ease, it could indicate fluid buildup.

Number of Lumps

Generally, lumps are singular, completely by themselves. But other times, there can be multiple, depending on what type of lumps we’re talking about. For example, a cyst would be an individual, flesh-colored or red lump.

A rash, on the other hand, might spread many small bumps across the visible skin.

Signs

Think very closely about the past several weeks. Has your dog shown any indication that they might be feeling unwell? Has anything changed, such as their appetite, bathroom habits, or personality?

Take note of any signs you can think of to mention to your vet for your appointment.

divider single dog paw oct 2024

When to See Your Vet Right Away

woman and labrador dog consulting with the vet
Image Credit: SeventyFour, Shutterstock

If you notice a lump on your dog’s stomach, it is important to make an appointment with your vet. It could be something as simple as a skin tag, but you don’t want to be the one to take the chance! Whenever you are concerned about your pooch’s condition, your vet is the one to call.

The internet is great for resources but not for diagnosis. So, if you have a concern or think that your dog is suffering as a result of the lump, your vet will be the first to help you out.

divider dog faces oct 2024

Conclusion

Now you understand what a lump on your dog could be. If your dog has any lump on them, regardless of what you might think it is, it’s always best to get checked instead of treating it at home. Medical diagnosis is always better than self-diagnosis!

See also: 


Featured Image Credit: Todorean Gabriel, Shutterstock

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Dogster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

2 Responses

  1. I discovered a hard blackish lump at abdomen of my PUG dog aged 12 years and consulted vet. Was told as benign but its developed quickly in 2-3 months making dog uneasy. My vet tried surgery but dog could not bear anaesthesia which affected his heart hence not operated. Under medication he started loss of appetite and started redish and brownish vomits and ultimately expired in 5 days.

    1. Hi Rajiv, thanks for reaching out to us. I'm so sorry to hear about your dog's passing. It sounds like you've been through a lot! It's heartbreaking to lose a pet that has been with you for so many years and especially to see them suffer. I hope you can find some solace in the memories you created over the years.

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

10 Dumbest Dog Breeds: Canine Intelligence Ranking

The Border Collie is widely considered to be the world’s smartest dog breed (with the Poodle coming in close second). If some are...

Brazilian Terrier Dog Breed: Info, Pictures, Care & Traits

It’s likely you’ve never heard of the Brazilian Terrier and for a good reason: They are only one of a few Brazilian breeds...

How to Clean Corgi Ears: 6 Vet-Approved Tips

Corgis are friendly little dogs with adorable, floppy ears that fold downward as puppies. However, as they grow, their ears start to stand...

16 Primitive Dog Breeds: Info, Pictures & History

Some dog breeds are exceptionally old. These ancient breeds often retain their ancestral behaviors and instincts thanks to little selective breeding over the...

More related

5 Adorable Long-Haired Chihuahua Haircuts & Grooming Styles (With Info & Pictures)

Chihuahuas are famous feisty dogs. Despite being so tiny, they have ginormous personalities. They are the national symbol of Mexico and have been...

Natural Ways to Get Rid of Fleas Fast: How NATPAT Helps Repel Fleas & Protect Your Home

In this age of well-fed, well-groomed pet dogs who share our beds and join us at hotels, it’s easy to think fleas are...

Silver Beige Poodle: Info, Pictures, Origin & History

Poodles are renowned as fashionistas of the doggy world, with their curly coats and multiple awards from competitions. The silver-beige Poodle is no...

How Are Pet Emergencies Handled on Holidays? Vet-Reviewed Facts & Prevention Tips

Accidents happen, but when one happens to your pet on a holiday, it can lead to disaster if you’re caught off-guard with your...

Keep reading

Can Dogs Eat Hot Sauce? Vet-Verified Health Facts

Some people like their food to be extra spicy, with hot sauces being a $1.65 billion market in the United States. Of course, not everyone likes the heat. That includes your dog. Wild or domestic canines don’t encounter this taste...

Can Dogs Eat Hot Sauce

10 Best Dog Treats for Small Dogs in 2025 – Reviews & Top Picks

Don’t bother expecting a small dog to act their size. Whether they’re stirring up trouble against a dog twice their weight or consuming enough food to feed a Saint Bernard, small dogs will find a way to make their presence...

woman feeding her dog a treat seated in stone stairs

How Much Does a Cavalier King Charles Spaniel Eat in a Day? Our Vet Explains

The Cavalier King Charles Spaniel is a toy dog breed that’s among the most popular dog breeds kept as pets today. Ranking at #14 according to the American Kennel Club’s (AKC) popularity ranking for 2023, it’s evident that these charming...

cavalier king charles spaniel eating bone treat

What Do Rottweilers Eat? Vet-Approved Feeding Guide

Rottweilers are big dogs with big appetites to match, so it’s essential to feed them appropriately to ensure they’re getting the nutrients they need to thrive. However, the number of dog food products available can make choosing the right diet...

rottweiler dog sitting next to an empty bowl

Can Dogs With Pancreatitis Eat Peanut Butter? Our Vet Explains

A big spoonful of peanut butter is delicious and comforting and certainly a much-loved treat for dogs. Unfortunately for pancreatitis patients, it is high in fat and can put a grumpy pancreas into a full-blown temper tantrum. For dogs that...

Can Dogs With Pancreatitis Eat Peanut Butter

Can Dogs Eat Parsnips? Vet-Verified Nutrition Facts, Risks & Serving Tips

Parsnips may have a small fan club. They aren’t as popular as other vegetables in the Apiaceae family, such as carrots and celery. Some think the former are sweeter, but parsnips have a slight edge. Nevertheless, these vegetables pack a...

Dogster-Can-Dogs-Eat-Parsnips

11 Best Dog Foods for Havanese in 2025 – Reviews & Top Picks

While Havanese are not the most popular small dogs in the United States, there are still quite a few of them out there. If you’re the proud owner of one of these tiny dogs, then feeding them the correct food...

Havanese dog eating

Can Dogs Eat Peaches? Vet-Reviewed Health Facts & FAQ

Peaches are delightful snacks, especially during the hot summer months. Some people even have peach trees growing in their yard and can grab a fruit on the go for a fast, juicy treat. If you’re a dog owner, it’s vital...

Can Dogs Eat Peaches