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

Share

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.

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.

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

If you need to speak with a vet but can't get to one, head over to PangoVet. It's our 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 V1


3. Cutaneous Histiocytoma

Cutaneous histiocytoma is a generally benign, rapidly 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.

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

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything dog

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.




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

Dogster’s Weekly Photo Contest Winners: I’m a Messy Eater (March 26, 2026)

Every week our team gets the privilege of sorting through our readers photos to choose what dogs will win this weeks contest! See...

The Itchy Dog Survival Guide: Home Remedies That Help

Allergies in dogs are more common than most people realize, and they’re genuinely hard to pin down. The immune system overreacts to something...

Another Winner, Another Controversy

Still recovering from the disappointment of seeing a docked & cropped dog awarded Westminster Kennel Club’s “Best in Show,” only to be kicked...

Dogster’s Weekly Photo Contest Winners: My Favorite Toy (March 19, 2026)

Every week our team gets the privilege of sorting through our readers photos to choose what dogs will win this weeks contest! See...

More related

How to Help an Old Dog With Bad Teeth: Vet-Verified Tips & Care Guide

Dental health is a key part of a dog’s overall health. Unfortunately, dental disease is a common, but often overlooked problem, especially in...

Are Poodles Aggressive? Breed Behavior & Vet-Approved Training Tips

Whether Toy, Miniature, or Standard, Poodles are a popular dog breed that’s been around for centuries. Originally bred for hunting, Poodles are loyal...

Can Cocker Spaniels Swim? Vet-Verified Facts & Tips

What do we love most about Cocker Spaniels? Their cute ears, big, lovely eyes, and pup-like personalities, of course. However, these dogs are...

Braque d’Auvergne Dog Breed: Info, Pictures, Care & More

If you’re like most people, you’ve probably never heard of the Braque d’Auvergne. That’s a shame because these French gun dogs make wonderful...

Keep reading

7 Best Dog Foods for EPI German Shepherds in 2026: Reviews & Top Picks

Exocrine pancreatic insufficiency (EPI) is a disease that severely impacts the pancreas’ ability to produce digestive enzymes. EPI can be a problematic condition for your canine to deal with, and it can be difficult for you as the dog owner...

german shepherd resting on the grass

What Is Human-Grade Dog Food? Vet-Verified Facts About Ingredient Difference

Bringing a dog into your life is a special time for a family. Not only do you have a new friend, ally, and snuggle partner, but there is also another life you’re responsible for. This means ensuring your pets are...

The farmer's dog Turkey recipe fresh

5 Best Fresh Dog Food Delivery Services in Australia: 2026 Reviews & Top Picks

More and more Australians are looking for a great way to feed their pooches without leaving the house. There are a number of fantastic dog food delivery services available in Australia, each with its own unique benefits. These services allow...

dog ordering food for delivery

Are Slow Feeders Good for Dogs? Vet-Reviewed Purpose & How to Use Them

Does your dog practically inhale their food? If so, you may want to consider a slow-feeder dog bowl. Slow-feeder bowls are designed to make food harder to get so that your dog has to pick around, gathering a kibble or...

Retriever dog holding a slow bowl in it's mouth in the kitchen

Can Dogs Eat Biscuits? Vet-Approved Facts & Safety Tips

Whether begging to share our dinner or rummaging through the trash, dogs love to eat human food. Unfortunately, not all people food is safe for dogs, so it’s important to know what they can and can’t eat. If you’re wondering...

Can Dogs Eat_biscuits

Nom Nom vs Spot & Tango: Which Fresh Dog Food is Better? 2026 Update

If you’re tired of researching dog food brands, don’t worry, you’re not alone. In the last 20 years, several new dog food manufacturers have entered the market to compete in the premium product category. Although the number of producers can...

Dogster_Dog Food Nom Nom VS Spot & Tango

Scrumbles Dog Food Review 2026: An Expert’s Breakdown

* Save 15% With Subscribe & Save Searching for the perfect dog food can be a challenge. Sometimes you think you’ve got it, and a suddenly fussy dog turns his nose up at dinner, and you’re back to square one....

DOG_SAPR_Scrumbles Dog Food

Can Dogs Eat Plantain? Vet-Approved Nutrition Facts & Info

Plantain is a fruit that looks very similar to a banana. The fruit is starchy and is not generally eaten raw, but it is regularly used in cooking in some countries around the world. High in dietary fiber and with...

ripe-plantains-on-rocks

Love Dogs? So Do We! Join the Dogster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Dogster Email Newsletter