Lump Under Spay Incision in Cat: What You Need to Know


If you’ve noticed a lump under your cat’s spay incision, you may be concerned and wondering what could be causing it.

In this blog post, we will explore the possible reasons for a lump under a spay incision in cats, when to be concerned, and what steps you can take to ensure your cat’s health and well-being.

Understanding Spay Surgery in Cats

Spaying, also known as ovariohysterectomy, is a common surgical procedure performed on female cats to prevent unwanted pregnancies and reduce the risk of certain health issues, such as uterine infections and certain types of cancer.

During the surgery, the veterinarian removes the cat’s ovaries and uterus.

Possible Causes of a Lump Under Spay Incision

  1. Surgical Site Reaction: It is not uncommon for cats to develop a small lump or swelling at the incision site after surgery. This is usually a normal part of the healing process and is known as a surgical site reaction. The lump may feel firm to the touch and can vary in size. It is important to monitor the lump for any changes in size, color, or discharge.
  2. Seroma: A seroma is a pocket of fluid that can accumulate under the skin at the surgical site. It is a common occurrence after surgery and can cause a lump or swelling. Seromas are usually harmless and will resolve on their own over time. However, if the lump becomes excessively large, painful, or shows signs of infection, it is important to consult your veterinarian.
  3. Hematoma: In some cases, a lump under the spay incision may be due to a hematoma, which is a collection of blood that has pooled under the skin. Hematomas can occur if a blood vessel is damaged during surgery. If you suspect a hematoma, it is important to seek veterinary attention, as it may require drainage or other treatment.
  4. Suture Reaction: Occasionally, cats may have a reaction to the sutures used to close the incision. This can result in swelling, redness, and the formation of a lump. If you notice any signs of suture reaction, such as discharge or the incision opening up, contact your veterinarian for further evaluation.

When to Be Concerned

While it is normal for cats to have some swelling or a small lump at the spay incision site, there are certain signs that may indicate a problem. You should be concerned if:

  • The lump is rapidly increasing in size.
  • The lump is warm to the touch.
  • The lump is painful or causing discomfort to your cat.
  • The incision site is red, inflamed, or oozing discharge.
  • Your cat is lethargic, not eating, or showing signs of illness.

If you observe any of these signs, it is important to contact your veterinarian for a thorough examination and appropriate treatment.

Taking Care of Your Cat’s Incision

To ensure proper healing and minimize the risk of complications, it is essential to follow your veterinarian’s post-operative care instructions.

Here are some general tips for taking care of your cat’s spay incision:

  1. Monitor the Incision: Keep a close eye on the incision site and check for any changes, such as swelling, redness, or discharge. If you notice anything unusual, contact your veterinarian.
  2. Prevent Licking: Cats may be tempted to lick or chew at their incision, which can introduce bacteria and delay healing. Use an Elizabethan collar (cone) or a surgical suit to prevent your cat from accessing the incision site.
  3. Keep the Incision Clean: Follow your veterinarian’s instructions for cleaning the incision site, if necessary. Avoid using any harsh chemicals or substances that could irritate the incision.
  4. Limit Activity: Restrict your cat’s physical activity, especially jumping and running, to prevent strain on the incision site. Provide a quiet and comfortable space for your cat to rest and recover.
  5. Administer Medications: If your veterinarian has prescribed any medications, such as antibiotics or pain relievers, make sure to administer them as directed.

Remember, every cat is unique, and the healing process may vary.

If you have any concerns or questions about your cat’s spay incision, do not hesitate to reach out to your veterinarian for guidance.


Finding a lump under your cat’s spay incision can be worrisome, but in many cases, it is a normal part of the healing process.

However, it is important to monitor the lump for any changes and contact your veterinarian if you notice any concerning signs or symptoms.

By following your veterinarian’s post-operative care instructions and providing a safe and comfortable environment for your cat to recover, you can help ensure a smooth healing process.

Frequently Asked Questions

Q: How long does it take for a lump under a spay incision to go away in cats?

A: The time it takes for a lump under a spay incision to go away can vary depending on the individual cat and the specific circumstances.

In most cases, the lump will gradually decrease in size over a few weeks to a couple of months.

However, if you have any concerns or notice any changes, it is best to consult your veterinarian.

Q: Can a lump under a spay incision in a cat be cancerous?

A: While it is rare, a lump under a spay incision in a cat can potentially be cancerous. However, the majority of lumps are benign and related to the healing process.

If you are concerned about the lump, it is important to have it evaluated by your veterinarian to rule out any serious underlying conditions.

Q: Should I be worried if the lump under my cat’s spay incision is warm to the touch?

A: If the lump under your cat’s spay incision is warm to the touch, it could be a sign of infection. Infections can occur if bacteria enter the incision site.

It is important to contact your veterinarian for further evaluation and appropriate treatment.

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