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Skin Lumps on Dogs


An older dog against a blue background

Skin lumps on dogs are common and can vary widely in appearance and significance. While many lumps are harmless, others can indicate a more serious condition, such as cancer. 


Understanding the types of lumps, their causes, and when to seek veterinary care is crucial for every dog owner. Early detection and appropriate action can make a significant difference in your dog's health and quality of life.


Common Causes of Skin Lumps on Dogs

A dog with skin lumps

Skin lumps in dogs can have several causes, ranging from benign growths to more concerning malignant tumours. Knowing the common causes can help you better understand what your dog might be experiencing.


Benign Lumps

Benign lumps are non-cancerous growths that are typically harmless. Common benign lumps include lipomas, which are soft, fatty lumps often found under the skin of older or overweight dogs. Cysts, which are fluid-filled sacs, and warts caused by the papillomavirus, are also common. While these lumps are generally not a cause for alarm, monitoring them for changes is essential.


Malignant Lumps

Malignant lumps are cancerous and can pose a significant health risk. These include mast cell tumours, which are one of the most common skin cancers in dogs, as well as melanomas and other types of cancers. Malignant lumps can vary greatly in appearance, and prompt veterinary assessment is crucial to determine the appropriate course of action.


Infections and Allergies

Skin infections, such as abscesses, can also cause lumps. These are often painful and may be accompanied by redness, swelling, and heat. Allergic reactions can also result in lumps, typically due to inflammation or hives. Identifying the cause of the allergy or infection is key to effective treatment.


Symptoms to Watch For

Understanding the symptoms of skin lumps on dogs can help you recognise when to take action. Not all lumps are created equal, so knowing what to look for is vital.


Physical Characteristics of Lumps

When examining your dog for lumps, pay attention to size, shape, texture, and colour. Lumps can be soft or firm, smooth or irregular, and can vary in colour from skin-toned to dark. Monitoring changes over time, such as growth in size, change in texture, or signs of inflammation, is important, as these could indicate a need for further investigation.


Behavioural Changes in Your Dog

Lumps can sometimes cause behavioural changes in your dog, especially if they are painful or irritating. Increased scratching, licking, or biting at the lump, as well as general signs of discomfort or lethargy, may indicate that the lump is causing distress. If you notice these behaviours, a vet visit is warranted.


Diagnosing Skin Lumps on Dogs

Accurate diagnosis of skin lumps on dogs is essential for determining the correct treatment. A veterinary examination is the first step in this process.


Veterinary Examination

During a veterinary examination, your vet will perform a physical assessment of the lump. This may include palpation (feeling the lump) to determine its characteristics and discussing your dog's medical history, including any recent changes in behaviour or health.


Diagnostic Tests

If the lump is suspicious, your vet may recommend further diagnostic tests. A fine-needle aspiration, where a small sample of cells is taken from the lump for analysis, is commonly used. In some cases, a biopsy, where a larger tissue sample is removed, may be necessary. 


Imaging tests such as X-rays or ultrasounds can also help in assessing lumps that are deep or in sensitive areas. These tests provide crucial information on whether the lump is benign or malignant and the best course of treatment.


Treatment Options for Skin Lumps

Once a lump has been diagnosed, your vet will discuss the best treatment options based on the type and severity of the lump.


Surgical Removal

Surgical removal is often recommended for lumps that are malignant, growing rapidly, or causing discomfort. The procedure involves excising the lump under anaesthesia, and in some cases, surrounding tissue may also be removed to ensure complete excision. 


Post-operative care will include monitoring the surgical site for signs of infection and ensuring your dog avoids licking or scratching the area.


Non-Surgical Treatments

Non-surgical treatments may be appropriate for certain types of lumps, particularly if surgery is not an option due to the location of the lump or your dog's overall health. These treatments can include medications to reduce inflammation or chemotherapy and radiation for cancerous lumps. Your vet will guide you through the benefits and risks of these options.


Monitoring Lumps

For lumps that are deemed non-threatening, a watch-and-wait approach may be recommended. Regular check-ups with your vet are important to monitor any changes in the size or nature of the lump. Keeping a record of the lump's appearance and any changes over time can help your vet make informed decisions about whether further action is needed.


Preventing Skin Lumps in Dogs

While not all skin lumps can be prevented, there are steps you can take to reduce the risk and catch them early.


Regular Check-Ups and Self-Exams

Regular veterinary check-ups are essential for early detection of lumps. In between vet visits, conduct self-exams on your dog by running your hands over their body to feel for any new or unusual lumps. Early detection can make a significant difference in treatment outcomes.


Diet and Lifestyle

Maintaining a healthy diet and active lifestyle for your dog can contribute to overall health and may help in reducing the risk of certain types of lumps. A balanced diet supports a strong immune system, which can help your dog fight off infections and maintain healthy skin.


Warning Signs

Seek veterinary care if you notice lumps that are growing rapidly, changing in colour, bleeding, or causing pain. Lumps that are hard, irregular in shape, or fixed in place are also concerning and warrant prompt attention.


In some cases, lumps may require immediate veterinary attention, such as if they rupture, cause significant bleeding, or are accompanied by severe pain or distress. If in doubt, err on the side of caution and consult your vet.


Key Takeaways

Skin lumps on dogs are a common concern but not always a cause for alarm. Understanding the different types of lumps, their causes, and symptoms can help you make informed decisions about your dog's health. 


Regular monitoring, prompt veterinary evaluation, and appropriate treatment are key to managing skin lumps effectively. By staying vigilant and proactive, you can help ensure your dog remains happy and healthy.


We believe preventing disease is a far better way of helping your pet stay fit, comfortable, happy and healthy. So we’ve created the Vital Pets Club to make sure every pet owner has easy access to the best pet care at an affordable price.
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