Can Lumps in Dogs Form after an Injection?


Injections of drugs are a common procedure for pets. Many Pets tolerate it normally, while in others complications could develop. It sometimes happens that a dog has lump after vaccination. Sometimes this leads to health problems.

Causes the Formation of Lumps at the Side of Injection

The introduced drug resolves itself normally, but sometimes it accumulates in one place, causing a seal. Factors causing swelling at the injection site:

  • lumps after injection in puppiesa sharp injection of the drug, as a result of which it accumulates in one place, not dispersing throughout the body;
  • the use of too short needle when part of the injection solution remains in the subcutaneous layer. This leads to the formation of a small seal at the injection site;
  • preparation for the procedure. This reason includes the use of expired drug, a drug of bad quality, improper preparation of the animal for injection;
  • violation of the methodology of the procedure – the vet may damage the tissue, resulting in the development of an abscess with purulent content;
  • intolerance of the active substance in the drug, which leads to an allergic response of the body;
  • hematoma-develops when a small vessel ruptures and represents a small accumulation of blood;
  • nerve damage during the puncture of the skin;
  • complications in the form of tumor, inflammatory focus, suppuration;
  • disease in pet during vaccination;

If a dog has lump after vaccination, it usually does not cause additional symptoms and goes away within a few days.

Symptoms of Complications

When an infection gets into the body through the place of injection of the drug, an inflammatory process begins to develop, which is manifested by a number of symptoms:

  1. lumps after vaccination in dogsthe swelling is growing in size;
  2. discharges from the tumor, more often with admixture of pus;
  3. redness of the area where the lump was formed;
  4. rise in temperature;
  5. pain in the affected area, especially when touched;
  6. weakness, lethargy, deterioration of the animal;
  7. lack of appetite, detachment, reduced activity;
  8. apathy, disturbed sleep.

If a hard lump after vaccination of the dog appeared, accompanied by similar symptoms, you need an urgent consultation of a veterinarian and prescription of medical procedures.

Types of Complications

A lump formed after injection can lead to the development of serious complications, including abscesses, ulcers, infiltrates, hematoma, nerve damage, air ingress if left unattended. Abscess is a cavity filled with purulent contents. You should not open the tumor yourself, as additional penetration of microbes leads to the development of severe consequences. Swelling is painful, hot to the touch. Treatment requires the appointment of analgesics, ointments for the extraction of pus. If the seal is opened, then an ulcer is formed in its place. The affected area is protected and then treated with an antiseptic.

Infiltrates look like abscesses. The difference is edema and inflammation, which does not form a cavity filled with pus, while maintaining a normal swelling temperature. Causes of formation: the use of blunt needle, wrong choice of drug.

Hematomas caused by damage to a large vessel. Initially, the color of the lump is red, but then changes to a bluish tint. Gradually, the swelling decreases. If the temperature in this place does not rise, it is recommended to speed up the process of elimination through massage and compresses. The most dangerous complications are nerve damage and air entering the vein. In the first case the dog begins to limp while there could be no swelling at all. Additional symptoms: seizures, loss of sensation. In the second case develops cough, choking, weakness, anaphylactic shock.

What to Do when a Lump Appears on the Withers?

By observing the following rules, the owner will avoid the formation of bumps on the withers after vaccination in dogs:

  • lumps after vaccination in puppiesPrepare your pet, calm down so that during the procedure the pet will feel relaxed, will not twitch and break out.
  • Observe the method of injection (for the vet): the use of clean tools, treatment of the injection site, careful administration of the solution.
  • Analysis of the condition of the pet. If there is no discharge out of the swelling and the condition of the animal is not dangerous, then the trip to the clinic can be delayed.

If the dog has large lump on back after vaccination and it gradually decreases in size, does not change color, does not fester, then there is no reason to panic. In this situation, you should wait, because it takes time for the drug to spread through the body. Upon detection of expiration, increase swelling, redness, as well as changes in the behavior of the animal, an urgent consultation with the specialist including appointment of an appropriate treatment is required.

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