Pet Health

Tumors, Growths, and Cysts in Dogs

Learn about tumors, growths, and cysts in dogs! Discover causes, treatments, and when to consult your vet for your furry friend’s health needs.
Author: Veterinary Team
Dial A Vet
Updated
June 6, 2025
|
Published
June 6, 2025
A veterinarian examining a dog's skin for tumors, growths, and cysts, ensuring proper diagnosis and treatment for the pet.

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Discovering a lump or bump on your dog can be a nerve-wracking experience. You might find yourself asking, "Is this serious?" or "What should I do next?" As pet parents, it’s natural to worry about your furry companion’s health, but not all growths are harmful. Understanding the differences between tumors, growths, and cysts in dogs can help you take the right steps toward ensuring their well-being.

⚠️ What to Watch For

It’s important to regularly check your dog for unusual lumps or bumps, as early detection plays a crucial role in effective treatment. Pay attention to:

  • New growths that appear suddenly
  • Changes in the size, shape, or color of an existing lump
  • Discharge, bleeding, or oozing from a growth
  • Swelling, redness, or warmth around the area
  • Signs of discomfort such as your dog licking or chewing the lump
  • Other symptoms like weight loss, appetite changes, or lethargy

While some lumps may be harmless, others can indicate underlying health concerns, so it’s always worth monitoring and consulting your veterinarian if you’re unsure.

🔍 Possible Causes

There are several potential causes for lumps, growths, and cysts in dogs. Here’s an overview of the most common types:

  • Benign Tumors: These non-cancerous growths include lipomas (fatty tumors) and papillomas (wart-like growths), which are usually harmless but may need removal if they become bothersome.
  • Malignant Tumors: Cancerous tumors, such as mast cell tumors or melanoma, require prompt diagnosis and treatment. These may spread to other areas of the body if left untreated.
  • Cysts: Cysts are fluid-filled sacs that can develop due to blocked hair follicles, oil glands, or infections. They’re often harmless but may require drainage or removal if infected.
  • Abscesses: Caused by bacterial infections, abscesses are swollen, pus-filled lumps that are often painful and require immediate veterinary care.
  • Skin Tags: These small, fleshy growths are typically benign and don’t require treatment unless they become irritated.

Determining the exact cause of a lump will usually require a veterinary examination, which may include a biopsy, fine needle aspiration, or imaging tests like X-rays or ultrasounds.

✅ What You Can Do at Home

While you should always consult a veterinarian if you discover a lump, here are a few things you can do to monitor your dog’s condition at home:

  • Perform Regular Checks: Run your hands over your dog’s body weekly to feel for any unusual bumps or swelling.
  • Note Changes: Keep a record of the lump’s size, shape, color, and texture. Taking pictures over time can help track any growth or changes.
  • Keep the Area Clean: If the lump has an open sore or discharge, gently clean it with warm water and a pet-safe antiseptic.
  • Prevent Licking or Scratching: Use an Elizabethan collar (cone) if your dog is excessively licking or scratching the area to prevent irritation or infection.

While these steps can help you manage the situation temporarily, they’re not a substitute for professional veterinary care. Always seek advice if you’re unsure about the lump or its progression.

💡 When to Call a Vet

It’s always better to err on the side of caution when it comes to your dog’s health. Reach out to your veterinarian if:

  • The lump appears suddenly and grows quickly
  • It feels hard, immovable, or irregular in shape
  • There is discharge, bleeding, or signs of infection
  • Your dog shows signs of pain or discomfort
  • They have additional symptoms like weight loss or appetite changes

Early diagnosis and treatment can make a significant difference, especially if the lump is cancerous. Your vet may recommend a biopsy or other diagnostic tests to determine the next steps.

According to VCA Animal Hospitals, many skin tumors in dogs are treatable, especially when caught early (source).

FAQs

Q: Are all lumps on my dog cancerous?
A: No, many lumps in dogs are benign (non-cancerous), such as lipomas or skin tags. However, it’s essential to have any new or changing growths evaluated by a veterinarian to rule out malignancy.

Q: Can I tell if a lump is dangerous by looking at it?
A: It’s difficult to determine if a lump is harmful based on appearance alone. A vet will often perform tests like a fine needle aspiration or biopsy to diagnose the growth.

Q: Should I wait to see if the lump goes away on its own?
A: It’s best not to wait, as some lumps may grow or worsen over time. Early diagnosis can lead to better outcomes, especially for malignant tumors.

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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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