Fluid Pocket Under the Skin in Dogs (Seroma)
- Occurrence: common
- Location of disease: Skin/Fur
When to visit the vet?
Home care monitor at home and contact your vet if worse
If the condition worsens / symptoms persist, consult a veterinarian.
Definition
A seroma is a collection of clear, yellowish fluid that forms under a dog’s skin, often after surgery or an injury. This fluid accumulation can lead to Swelling and impair the healing process.
The most important facts at a glance
A seroma is a collection of tissue fluid under the skin that frequently occurs in dogs after surgery or traumas. This fluid accumulation develops when blood vessels and lymphatic pathways are damaged, causing fluid to be retained in the surrounding tissue. This can particularly occur after major surgeries such as castration / neutering or tumor removal. Insufficient rest after a procedure can also contribute to seroma formation. Symptoms include painless swelling under the skin that is compressible and mobile. For diagnosis, a physical examination and analysis of the fluid by aspiration are often performed. Treatment depends on the size and symptoms of the seroma. Smaller seromas often resolve on their own, while larger ones can be treated through aspiration or surgical intervention. The prognosis is generally good if the seroma is detected and treated early. For prevention, good postoperative care and adherence to rest periods are crucial. Research is focusing on improved surgical techniques as well as the role of medications in reducing Inflammatory conditions and promoting healing. Genetic factors and the immune response are also being studied to better understand and prevent seroma formation.
Causes
A seroma develops when tissue fluid, which normally circulates in the blood vessels, leaks into the space between the skin and the underlying tissue. This fluid can accumulate in response to surgical procedures, traumas, or other tissue damage.
In dogs, a seroma can occur after surgery if blood vessels are injured and fluid leaks into the surrounding tissue. This often happens during major surgical procedures involving significant tissue movement or manipulation, such as castration / neutering, tumor removal, or orthopedic surgeries.
Another common reason for seroma formation is trauma that damages blood vessels and lymphatic pathways, allowing fluid to leak into the surrounding tissue. The severity of the trauma and the affected area can influence the size and impact of a seroma.
Another factor that can contribute to seroma formation is insufficient rest after surgery. If dogs are too active while their body is trying to heal, this can lead to additional irritation and fluid accumulation.
Symptoms
The most noticeable symptom of a seroma in dogs is a soft Swelling under the skin at the site of a recent surgery or injury. This Swelling may feel warm, but is usually not painful.
In some cases, a seroma may cause redness or mild Inflammatory conditions in the area around the Swelling. The dog may also show signs of discomfort if the area is touched or manipulated.
Although a seroma is usually harmless, it can become problematic if it gets infected. Signs of an infection can include Fever, Pus formation, or increased Pain. In such cases, immediate veterinary treatment is required.
Therapy
The treatment of a seroma depends on its size and the symptoms associated with it. Smaller seromas that do not cause discomfort are often monitored, as they often resolve on their own.
For larger or painful seromas, aspiration may be performed to remove the fluid and relieve pressure. This procedure may be repeated several times until the seroma no longer refills.
In cases where the seroma has become infected or does not respond to conservative treatments, surgical intervention may be necessary to drain it and clean the area. Antibiotics may be prescribed to prevent or treat an infection.
In addition to medical treatment, applying warm compresses and restricting the dog’s activity can help promote healing and prevent seroma formation.
Prognosis and follow-up care
The prognosis for dogs with seromas is generally good, especially if the seroma is detected early and treated appropriately. Most seromas resolve on their own over time without long-term effects on the dog’s health.
Complications can occur if a seroma becomes infected or is not treated correctly. In such cases, more intensive treatment may be necessary to control the infection and support the healing process.
Complete recovery can vary depending on the size of the seroma and treatment outcomes. Owners who follow their veterinarian’s instructions, particularly regarding rest and activity, have the best chances for a quick and complete recovery.
Prevention
The prevention of seromas begins with careful postoperative care. After surgery, it is important to follow the veterinarian’s instructions regarding rest and activity for the dog precisely, to avoid excessive stress on the tissue.
Wearing an appropriate bandage or compression wrap can help reduce the risk of seroma formation by minimizing the space for fluid accumulation. However, the bandage should not be too tight to avoid impairing blood flow.
Regular follow-up examinations with the veterinarian can help detect and treat seromas early before they become major problems. Careful observation of the surgery or injury site for signs of Swelling or fluid accumulation is also important.
Another preventive approach is to minimize the risk of traumas by keeping the dog in a safe environment and avoiding excessive physical activities that could lead to injuries.
Outlook on current research
Research on the treatment and prevention of seromas in dogs is a dynamic field that is constantly evolving. A seroma is a collection of clear fluid that typically forms under the skin after surgery or an injury. Currently, scientists are investigating various approaches to minimize the risk of seroma formation, as well as effective methods for treatment if they occur.
A key area of research focuses on the surgical techniques themselves. By improving surgical methods, researchers hope to prevent the formation of seromas from the outset. This includes the development of minimally invasive techniques and the optimization of surgical suturing methods to minimize the space where fluid could accumulate. The use of special drains placed during and after surgery is also being intensively studied.
Another research approach lies in the role of medications and supplements that can promote healing and reduce Inflammatory conditions. Here, it is being examined whether certain medications or natural substances can reduce the likelihood of seroma formation. Studies are also investigating the potential effect of anti-inflammatory medications to modulate the body’s response to surgical procedures.
In the area of preventive measures, the importance of proper postoperative care is also being studied. Researchers are analyzing how factors such as the dog’s physical activity, the hygiene of the surgical wound, and general health monitoring can influence healing and seroma formation. Evidence that optimal aftercare could be crucial is gaining importance.
Another exciting research branch deals with the genetic disposition of certain dogs to develop seromas. It is being investigated whether there are genetic markers that indicate increased susceptibility and could lead to targeted preventive measures. These findings could contribute in the long term to better assessing individual risks and developing prophylactic measures.
Furthermore, the role of the immune response in seroma formation is being investigated. Researchers are trying to understand how the immune system responds to surgery and injuries and how this response influences seroma formation. These insights could lead to new therapeutic approaches aimed at modulating the excessive immune response.
Overall, research into seromas remains an exciting and important field, with many parallel studies aimed at improving the quality of life of dogs after surgical procedures and minimizing complications. The findings from these studies could be of significance not only for dogs, but also for other animals and possibly for human medicine.
Frequently Asked Questions (FAQs)
1. What is a seroma in dogs?
2. How do I recognize a seroma in my dog?
3. Is a seroma dangerous for my dog?
4. How is a seroma treated in dogs?
5. How can I prevent a seroma in my dog?
6. Can seromas occur in all dogs?
7. How long does it take for a seroma to heal?
8. Can a seroma disappear on its own?
9. Is it always necessary to treat a seroma?
10. What should I do if I suspect a seroma in my dog?
Literature
- Shaver, S. L., & Hunt, G. B. (2014). Evaluation of fluid production and seroma formation after placement of closed suction drains in clean subcutaneous surgical wounds of dogs: 77 cases (2005–2012). Journal of the American Veterinary Medical Association, 245(2), 211–215. https://doi.org/10.2460/javma.245.2.211
- Travis, B. M., Hayes, G. M., Vissio, K., Harvey, H. J., Flanders, J. A., & Sumner, J. P. (2018). A quilting subcutaneous suture pattern to reduce seroma formation and pain 24 hours after midline celiotomy in dogs: A randomized controlled trial. Veterinary Surgery, 47(2), 204–211. https://doi.org/10.1111/vsu.12754
- Matiasek, L. A., Platt, S. R., Dennis, R., & Petite, A. (2006). Subfascial seroma causing compressive myelopathy after cervical dorsal laminectomy. Veterinary Radiology & Ultrasound, 47(6), 581–584. https://doi.org/10.1111/j.1740-8261.2006.00189.x
- Spåre, P., Ljungvall, I., Ljungvall, K., & Bergström, A. (2021). Evaluation of post-operative complications after mastectomy performed without perioperative antimicrobial prophylaxis in dogs. Acta Veterinaria Scandinavica, 63, Article 35. https://doi.org/10.1186/s13028-021-00600-3
- Mattioli, G., Cino, M., Stefanello, D., Drudi, D., Morello, E. M., Pisani, G., Chiti, L. E., Pierini, A., Gariboldi, E. M., De Zani, D., Massari, F., Giacobino, D., & Martano, M. (2025). Peripheral sentinel lymphadenectomy in 163 dogs: Postoperative surgical complications and comparison between intraoperative dissection techniques. Veterinary Surgery, 54(4), 766–776. https://doi.org/10.1111/vsu.14246
- Tobias, K. M., & Johnston, S. A. (Eds.). (2018). Veterinary surgery: Small animal (2nd ed.). Elsevier.