Pet Health

Lumps on Dogs

Discover common causes of lumps on dogs, how to identify them, and when to seek veterinary care. Keep your furry friend healthy and happy!
Author: Veterinary Team
Dial A Vet
Updated
June 6, 2025
|
Published
June 6, 2025
Close-up of a veterinarian examining a dog's skin lumps during a check-up for potential health issues.

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Discovering a lump on your dog can be a scary moment for any pet owner. Questions immediately flood your mind: Is it dangerous? Should I call the vet? While not all lumps are harmful, it’s important to know what to look for and how to act. In this blog, we’ll break down everything you need to know about lumps on dogs so you can make informed decisions about your furry friend’s health.

⚠️ What to Watch For

Lumps on dogs can vary widely in appearance, size, texture, and location. Some may be harmless, while others could signal an underlying health issue. Here are key things to monitor if you discover a lump:

  • Size: Is the lump small like a pea or larger and growing over time?
  • Shape: Is it round and smooth, or irregular and uneven?
  • Texture: Is it soft and squishy or firm and hard?
  • Color: Does it match your dog’s skin tone, or is it red, dark, or discolored?
  • Movement: Can you move the lump under the skin, or is it fixed in place?
  • Symptoms: Is your dog scratching, licking, or showing signs of pain or discomfort?

Pay attention to any changes over time. A growing or changing lump is always worth investigating further.

🔍 Possible Causes

There are many reasons your dog might develop a lump. Some are completely harmless, while others require medical attention. Here are the most common possibilities:

  • Benign tumors: Growths like lipomas (fatty tumors) are common in older dogs and are usually harmless.
  • Abscesses: These are pockets of infection that can form under the skin, often caused by bites, wounds, or foreign objects.
  • Skin cysts: These fluid-filled sacs can develop when hair follicles or oil glands become blocked.
  • Warts: Caused by a virus, warts are small, benign growths that are more common in younger dogs.
  • Malignant tumors: Unfortunately, some lumps, like mast cell tumors or melanomas, can be cancerous and require urgent attention.
  • Allergic reactions: Insect bites, stings, or contact with allergens can cause temporary lumps or swelling.

Knowing the cause of a lump requires a proper veterinary diagnosis, so avoid guessing or self-diagnosing.

✅ What You Can Do at Home

While waiting for a vet appointment or monitoring a lump, there are a few things you can do at home to help your dog:

  • Keep the area clean: If the lump is open or oozing, gently clean it with warm water and a pet-safe antiseptic.
  • Prevent licking: Use an e-collar to stop your dog from licking or scratching the lump, which could cause irritation or infection.
  • Take notes: Track the lump’s size, shape, and any changes over time. Photos with a ruler for scale can be helpful.
  • Monitor symptoms: Watch for signs of pain, lethargy, appetite changes, or additional lumps appearing elsewhere.

While these steps can help in the short term, they are not a substitute for veterinary care if the lump is concerning.

💡 When to Call a Vet

If you’ve found a lump on your dog, it’s always better to err on the side of caution and consult your vet. However, certain signs make a vet visit particularly urgent:

  • The lump is growing rapidly or changing in appearance.
  • It feels hard, immovable, or irregular in shape.
  • Your dog seems in pain when the lump is touched.
  • The lump is bleeding, oozing, or has an unpleasant smell.
  • Your dog is showing other symptoms like lethargy, weight loss, or appetite changes.

Your vet may recommend a fine-needle aspiration (FNA), biopsy, or other diagnostic tests to determine the nature of the lump and the best course of action.

FAQs

Q: Are lumps on dogs always cancerous?
A: No, most lumps on dogs are benign, especially in older pets. However, it’s important to have any lump evaluated by a vet to rule out cancer or other serious conditions.

Q: How can I tell if a lump is dangerous?
A: Dangerous lumps often grow quickly, feel hard or fixed, or cause pain. Still, the only way to know for sure is through veterinary examination and testing.

Q: Can I remove a lump on my dog at home?
A: No, attempting to remove a lump at home can be very dangerous and lead to infection or complications. Always leave this to a licensed veterinarian.

Book a $49 online vet consultation at https://www.dialavet.com for fast, expert advice.

References

While every effort is made to ensure the accuracy of this content - including vet review where applicable - this article is for informational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment. If your pet is unwell or you are concerned, please speak with a licensed veterinarian. You can book a $49 online consultation with our veterinary team  😄
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