By Dr Duncan Houston
Your cat has a belly button, although finding it under the fur can be surprisingly difficult. It usually looks nothing like the obvious dip or bump on a human abdomen.
If you have noticed a lump while stroking your cat, the useful question is whether you are looking at normal anatomy or a change that needs examination.
Quick Answer
Yes, cats have belly buttons: small scars where their umbilical cords were attached before birth. A healed navel is usually flat and difficult to see beneath the fur. You do not need to find or clean it, but a new lump, soreness or discharge needs veterinary advice.
Why do cats have belly buttons?
Cats are placental mammals. Before birth, each kitten connects to a placenta through an umbilical cord, which carries oxygen and nutrients to the developing kitten. The cord separates after birth, and the attachment site heals into the scar called the umbilicus, or belly button.
Both male and female cats have one. It does not disappear when a cat is desexed. Plant City Animal Hospital's explanation of feline navels describes why the small, flat scar is easily hidden by skin and fur.
Where is a cat's belly button?
It lies on the midline of the underside, behind the ribcage and towards the centre of the abdomen. You may see a tiny scar or subtle indentation when the fur parts, or nothing obvious at all. There is no need to shave your cat or keep searching if the skin looks comfortable and healthy.
- Nipples: these are small raised structures arranged on either side of the midline. Male cats have nipples too; they are separate from the single navel.
- Primordial pouch: this is the broader, loose flap of skin and fat hanging along the lower belly, often most noticeable near the hind legs. It is not a belly button or a discrete lump. FOUR PAWS explains this normal feline feature, which alone does not tell you whether a cat is overweight.
- Surgical scar: an abdominal operation can leave a longer scar nearby. Appearance alone cannot reliably identify what surgery a cat has had. New swelling at a recent incision should be checked by the operating clinic.
What is normal, and when should you call a vet?
| What you notice | What it may mean | Next step |
|---|---|---|
| No visible navel, or a faint, flat scar with comfortable skin | Normal healed anatomy | No treatment needed. Ask at a routine visit if you are curious. |
| A new small bulge, with your cat otherwise comfortable | A hernia or another lump | Call your vet to arrange examination. Do not assume it is a normal "outie". |
| Redness, discharge, repeated licking or swelling at a recent incision | Possible irritation, infection or a surgical complication | Contact your vet today. A newborn kitten needs immediate advice. |
| A painful or rapidly enlarging bulge, especially with vomiting or marked lethargy | Possible trapped tissue or another serious problem | Seek emergency veterinary care now. |
Could a belly button lump be an umbilical hernia?
An umbilical hernia forms when the abdominal wall does not close fully at the cord attachment. Fat or sometimes part of an abdominal organ can protrude beneath the skin. Other possibilities include a skin lesion, infection or swelling related to surgery, so a photograph or home examination cannot confirm the cause.
The vet checks the swelling and abdominal wall; imaging may be needed to assess its contents. An uncomplicated hernia may be monitored or repaired at a planned operation, whereas trapped tissue needs urgent treatment. Urban Animal Veterinary Hospital's hernia guidance explains how compromised blood flow to trapped intestine can become life-threatening. Do not assume a kitten will grow out of a lump without veterinary assessment.
When is this an emergency?
Call an emergency veterinary clinic now if a belly swelling becomes painful or enlarges rapidly, particularly with vomiting, refusal to eat or pronounced weakness. Do not push it back in or wait to see whether every warning sign appears.
Newborn kittens need extra caution. An inflamed or discharging cord attachment, failure to nurse or unusual weakness warrants immediate veterinary advice. The Merck Veterinary Manual's neonatal care guidance emphasises monitoring nursing, vigour and weight because infection and feeding problems can seriously affect young kittens.
How to check safely
- Let your cat choose the position. Look during relaxed grooming if your cat accepts it. Stop if they turn away, tense up or resist.
- Look without pressing. Gently part the fur. If you see a change, note its location and take a clear photo if this is easy and comfortable.
- Notice the whole cat. Tell your vet about appetite, activity, vomiting, licking, recent surgery and when the change first appeared.
- Leave a newborn's cord alone. Do not pull off the stump. If a cord remains attached after delivery or you are unsure about its care, PDSA advises contacting a vet for instructions.
Common mistakes to avoid
- Assuming every abdominal bump is a nipple or belly button.
- Squeezing, repeatedly pushing or tying off a lump, or taping a coin over it.
- Applying human creams, disinfectants or home remedies without veterinary advice.
- Forcing a cat onto their back to inspect an area that seems painful.
Frequently Asked Questions
Do male cats have belly buttons?
Yes. Every male kitten also had an umbilical cord before birth. Sex does not change whether a cat has a navel.
Why can't I find my cat's belly button?
The scar is small, usually flat and covered by fur. Not being able to see it is normal and does not require further searching.
Do I need to clean my cat's belly button?
A healthy, healed navel needs no special cleaning. Discharge or soreness is a reason to contact your vet, rather than scrub the area.
Is my cat's hanging belly their belly button?
No. The loose belly flap is usually the primordial pouch. A new focal lump or a change in abdominal size still needs assessment.
Does every belly button lump need surgery?
No. Treatment depends on what the lump is. A vet needs to examine it before deciding whether monitoring, medication or surgery is appropriate.
A small scar should not cause trouble
A hidden, comfortable navel is normal. Focus on changes such as swelling, pain or discharge, and let a vet identify an unexplained lump.
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