Fatty lumps on Labradors are very common, and most turn out to be lipomas: soft, slow-growing, non-cancerous growths of fat under the skin. The catch is that you cannot tell a harmless lipoma from something more serious just by feeling it. Any new lump deserves a quick vet check, which usually means a simple needle test that takes a few minutes.
Disclaimer: This content is for informational purposes only and is not medical or veterinary advice. Consult your veterinarian about any lump or change you find on your dog.
What is a lipoma?
A lipoma is a benign tumour made of fat cells. According to the Cornell Richard P. Riney Canine Health Center, lipomas are one of the most common benign tumours in dogs. They are typically round, soft and movable, and usually sit just under the skin on the chest, belly, sides or upper legs. A dog may have one, or several.
Why Labradors get them
The exact cause of lipomas is unknown. Cornell notes that older dogs, overweight dogs and certain breeds, including Labrador Retrievers, are more likely to develop them. Given how easily many Labradors gain weight, it is no surprise that owners of middle-aged and senior Labs find them so often.
Not every fatty lump is the same
Simple lipomas
The usual kind. They grow slowly inside a thin capsule and tend to stay put. Many never cause any trouble.
Infiltrative lipomas
Less common. Cornell explains that these push into surrounding muscle, bone or nerves. They are still benign, but they tend to grow faster and are more likely to come back after removal.
Liposarcoma
A rare malignant tumour of fat cells. It rarely spreads to other parts of the body but often invades nearby tissue, so it needs a different treatment plan.
Other types of tumour, including some that are more serious, can feel very similar to a lipoma under the fingers. That is the main reason vets test rather than guess.
How your vet checks a lump
Your vet will start by feeling the lump and asking how long it has been there and whether it has changed. The next step is usually a fine needle aspirate (FNA). Cornell describes this as a minimally invasive test where a small needle is used to collect cells from the lump so they can be examined under a microscope.
Most dogs tolerate an FNA about as well as a vaccination, and it is often done in the consulting room without sedation. If the sample shows only normal fat cells, that strongly supports a lipoma. If the result is unclear, or the lump behaves unusually, your vet may suggest a biopsy or imaging.
When a lipoma needs treatment
Not every lipoma needs to come out. Many vets simply monitor a confirmed simple lipoma. Removal is more likely to be discussed when a lump:
- Grows quickly or changes shape or texture
- Sits somewhere that affects movement, such as the armpit or between the legs
- Becomes large enough to be uncomfortable
- Is confirmed or suspected to be infiltrative
- Gives an unclear test result
Smaller lumps are generally simpler to remove than large ones, which is another reason not to wait and see without a diagnosis.
How to keep track at home
Labradors are easy to check because most love a belly rub. Make it a monthly habit:
- Run your hands slowly over your dog from nose to tail, including the chest, belly, armpits, legs and tail.
- When you find a lump, measure it with a ruler or tape and note its location.
- Take a clear photo with a coin or ruler beside it for scale.
- Keep a simple “lump map” in your phone with dates, sizes and your vet’s findings.
This record is genuinely useful to your vet. It turns “I think it’s got bigger” into a clear answer.
Can you prevent lipomas?
There is no proven way to prevent lipomas, and no home remedy has good evidence for shrinking them. Because excess weight is linked to a higher risk, keeping your Labrador lean is the most sensible step you can take. Our guide to Labrador weight management strategies covers the practical side.
When to see the vet promptly
Book an appointment soon if you find any new lump, and sooner if a lump is growing quickly, feels hard or fixed in place, is red, hot, painful or bleeding, or appears alongside weight loss, lethargy or changes in appetite. For a wider look at conditions to watch, see our Labrador health guide to 12 common conditions.
The bottom line
Most fatty lumps on Labradors are harmless lipomas, but “most” is not “all”. Have every new lump checked with a quick needle test, keep a simple record of sizes and locations, and keep your dog at a healthy weight. That approach catches the rare serious lump early and saves you months of worrying about the harmless ones.
