Causes of inflammation of lymph nodes in a dog

Воспаление лимфоузлов у собак

Inflammation of lymph nodes in a dog (lymphadenitis) is a sign of quite a number of diseases. First of all, it indicates that something is wrong in the body.

Lymph nodes filter, clean lymph, enriching it with lymphocytes. In doing so, they detain harmful substances entering the body, or infectious agents. If the dog is healthy, they cope with their task.

However, if the animal's body is weakened and at that moment pathogenic microorganisms get into its lymphatic system, it is beyond the power to neutralize their immune system. In this situation, the cells of the lymph node start to multiply intensively and the knot itself increases. He is strenuously supplied with blood, becomes tense and hot, and when probing the dog is in pain.

Even the slightest changes in the behavior of the dog should serve as a signal to its owner for a careful examination of the animal. It is compulsory that this examination should include an attentive feeling of the head and neck of the dog, namely, the places where the lymph nodes are located. This is between the upper and lower jaw, slightly closer to the ear and under the lower jaw.

In a healthy animal, the lymph nodes on the head should not be probed. And if you find balls under the skin, it means that the lymph nodes are inflamed and this indicates the presence of the disease.

Causes of inflammation of lymph nodes in dogs

Лечение воспаления лимфоузлов у собак The reasons can be quite a lot, and they can turn out to be very diverse.

It can be:

  • Immune response to a bacterial or viral infection,
  • Malignant neoplasms
  • Or even a reaction to mechanical compression of a tight collar

Swelling of the lymph nodes is divided into acute and chronic. Acute swelling characteristic of the acute course of inflammation of the lymph vessels, which occurs as a result of infectious anemia, rhinitis, sap. Chronic swelling of the lymph nodes on the head of the dog is most often associated with chronic rhinitis or nasal sap.

An increase in the volume of all the lymph nodes on the body of the dog occurs in cases of carnivorous plague , tuberculosis, anthrax, actimycosis, hyperplasia (the appearance of tumors in the tissues), leukemia ( cancer of the blood in dogs ) and lymphoma (lymphosarcoma).


Specifically, lymph nodes are not treated. Only in case of their mechanical damage (for example, with a tight collar) must all the interfering factors be removed. In other cases of inflammation of the lymph nodes it is necessary to treat the primary disease.

Therefore, in any case, if there are inflammatory lymph nodes in a dog, it is necessary to urgently go to a veterinary clinic and undergo a checkup to establish an accurate diagnosis and begin an adequate treatment of the dog.

More often in viral and infectious diseases, antibiotics are prescribed and if using them, lymph nodes on the neck do not decrease, this may mean that the dog is ill with lymphoma (lymphosarcoma). In such a situation, hormone treatment is prescribed, specific tests are performed, and then chemotherapy is prescribed.

At the site of the enlarged lymph node sometimes there is an abscess. Initially, he is treated with therapeutic methods. But if the suppuration continues, so that the infection does not spread further, the abscess in the dog is opened , cleaned and installed drainage. Further treated as any purulent wound.


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