Lump in Cat after Vaccination – How to Help Your Pet?


Cats always stay at home with their masters. That is why it is easy to notice the changes in the behavior of the pet when it is sick. In order to prevent the development of infections or other serious problems, such as rabies or chlamydia, preventive vaccinations are provided even for domestic cats that do not go outside the house.

When Vaccination Is Required?

Vaccination strengthens the immune system of the animal and protects its and the owner from serious diseases that can lead to death of the pet. Vaccination is especially important before trips, visits to exhibitions and shows, where contact with other pets is possible. Vaccination is often performed before binding to ensure the birth of healthy and active kittens. In animals, as well as in humans, there is a vaccination schedule. Possible problems after vaccination: the appearance of a lump There are not many cases when cats have negative reactions to vaccination. Sometimes it happens that a cat has lump after vaccination. This problem may be caused by the following reasons:

  • big lump in cat after vaccinationAllergy to vaccination;
  • A mistake in the vaccination process (improper puncture site, incorrect needle insertion);
  • Individual characteristics of the body;
  • Independent vaccination.

Lumps can increase over time and become red. It is very important to take timely measures for treatment of the animal, if cat has lump after vaccination. The formation often accumulates pus if there is an inflammatory process. The following complications may develop:

  1. little lump in cat after vaccinationAbscess is a purulent inflammation that is formed due to infection of the wound. A bump from the injection of the neck is hot to the touch and very sore. The cat is suffering. Body temperature may rise. Pyogenic abscess is treated by dissection of the tumor and treatment of the affected areas with antibiotics.
  2. Postinjection sarcoma is an even rarer complication than an abscess. It is a malignant formation. In this case the lump does not disappear for a long time. It is hard but often painless. In such cases, radical therapy is used. A lump on the withers is removed, capturing nearby areas of tissue. Radiation or chemotherapy may be used as additional methods.

After vaccination, the owners need to carefully monitor the animal, regularly inspecting the injection site. If a lump is formed, and it does not disappear for a long time, it causes discomfort to the cat, bleeds, becomes covered with ulcers, the skin over it becomes bald, you should consult the veterinarian.

How to Help the Animal?

In case the owner noticed cat has lump on neck after vaccination, he/she should not perform any independent treatment since the exact cause of the lump formation is not established yet. At this stage, the best thing you could do to help the cat is to visit the vet immediately. The specialist will conduct a full diagnosis and prescribe tests to soft lump in cat after vaccinationestablish the cause of the lump formation. Only after that you can start treatment. The treatment may include:

  • The use of specific drugs that reduce allergic reaction or inflammation;
  • Compresses.
  • In rare cases, the veterinarian prescribes surgical removal of the lump.


Situations when a cat has a lump on his back after vaccination occur often. Do not use any medication without consulting with a specialist. In case of timely treatment, the problem will disappear in 5-7 days.

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