Swollen lymph nodes, also called lymphadenitis, occur in dogs due to a higher level of white blood cells caused by an infection in the body or a disease of the tissues, according to Vetinfo. There are several causes of swollen lymph nodes, such as allergic reactions, internal parasites, leukemia, autoimmune conditions, and viral, bacterial or fungal infections.Know More
Lymph nodes are tiny glands found in different parts of the body, such as the neck, explains Vetinfo. They are responsible for filtering blood and storing the white blood cells or the lymphocytes. Autoimmune conditions happen when the dog’s body reacts negatively to its own cells, while viral, bacterial or fungal infections are usually transmitted from other pets or ticks and fleas. An abnormal growth on the lymph nodes or an injury within the lymph node area also causes the nodes to enlarge.
Vetinfo states that a dog with lymphadenitis usually has palpated and enlarged lymph nodes. Aside from the swollen appearance, other symptoms of swollen nodes in the neck area include difficulty in swallowing, difficulty in breathing, lack of appetite, nausea, vomiting and lethargy due to infection. A veterinarian typically performs a physical exam and several blood tests to diagnose the condition. Lymph node aspirates also help with the diagnosis. X-rays are necessary if cancer is a suspected cause and a biopsy may be necessary if there is a tumor.Learn More
Gangrene occurs when tissues in the body die because of a lack of proper blood flow, according to PubMed Health. Although gangrene most commonly affects the fingers, toes and other external parts of the body, it can also affect internal organs, notes WebMD.Full Answer >
A dog that is vomiting white foam may be suffering from some sort of stomach upset, according to Vetinfo. This commonly occurs if a dog eats something that disagreed with him or takes in water too quickly after exercising, However, if other symptoms are present, it could be a sign of a more serious condition.Full Answer >
A cat sneezes blood usually because of an obstruction in the cat's nasal passage, a cold, bacterial infection, allergies or dental problems like an abscessed tooth, according to Vetinfo. Sneezing blood rarely indicates a more serious problem.Full Answer >
There are several reasons why a cat may scratch and cause scabs to form on its neck, including food allergies, rinworm and stress. Other reasons for scabs include tumors, fleas, ticks, dry skin and grooming products.Full Answer >