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Discover what causes an outie belly button in newborns, when it’s a sign of an umbilical hernia or granuloma, and how to care for it safely.
8 min
29/10/2025
When your baby’s umbilical cord falls off, it can be both fascinating and slightly nerve-wracking to see what’s left behind. Many parents expect a neat little “innie” belly button, so when it looks like it’s sticking out, it can cause some worry. The good news is that most “outie” belly buttons are completely harmless and simply part of how your baby’s body has healed.
Let’s explore what causes an outie, how to tell when it’s normal, and when it might need checking by a health professional.
The short answer is that it usually comes down to how your baby’s body heals after the umbilical cord stump falls off. The umbilical cord was your baby’s lifeline during pregnancy, connecting them to the placenta for oxygen and nutrients. After birth, the cord is clamped and cut, leaving a small stump that naturally dries out and drops off within a week or two.
Once it heals, some babies end up with a belly button that goes inward (an “innie”) while others have one that protrudes slightly (an “outie”). This difference has nothing to do with how the cord was cut or how you cared for it, it’s simply how your baby’s body formed and healed.
An outie is usually just a variation in normal anatomy. However, in some babies, what looks like a simple outie may actually be caused by a small umbilical hernia or a tiny overgrowth of healing tissue, known as a granuloma.
An “outie” belly button is one that sticks outwards rather than dipping inwards. The skin around the belly button may appear raised, rounded, or slightly soft to touch. Some outies flatten over time as your baby grows, while others stay visible into childhood and adulthood.
It’s worth remembering that “outie” isn’t a medical diagnosis, it’s just a description. In most cases, it’s harmless. What matters is that the area looks healthy, clean, and free from redness, swelling, or discharge.
Although most outies are simply normal variations, there are a few possible reasons why your baby’s belly button might stick out.
This is one of the most common reasons a baby’s belly button protrudes. An umbilical hernia happens when a small gap remains in the abdominal wall where the umbilical cord once passed through. When your baby cries, coughs, or strains, a small bit of intestine or fatty tissue can bulge through this gap, causing the belly button to pop out more noticeably.
Umbilical hernias are common, especially in premature babies and those with lower birth weights. The reassuring part is that they usually close on their own as your baby’s abdominal muscles strengthen. Most heal completely by the age of two to three years.
You might notice the hernia is more visible when your baby is crying or pushing, and flatter when they’re calm. As long as it’s soft, not painful, and not growing rapidly, it’s usually safe to simply keep an eye on it.
Seek medical advice if the hernia becomes firm, discoloured, painful, or your baby seems unwell, these are rare signs of a complication called incarceration, which needs urgent review.
After the cord stump falls off, some babies develop a small pink or red moist lump at the base of the belly button called a granuloma. This is simply an overgrowth of healing tissue. It may look shiny or weepy and can make the area appear slightly raised.
A granuloma is not an infection and doesn’t hurt your baby. In most cases, your health visitor or GP can advise and it usually heals beautifully once treated.
Sometimes, there’s no hernia or granuloma at all…just a natural difference in how the skin and connective tissue closed. The cut, the way the cord dried, or even how the baby’s tummy muscles sit can influence the final shape.
This type of outie is purely cosmetic and doesn’t indicate any medical problem. It’s simply how your baby’s unique belly button formed, and it doesn’t require treatment.
Very rarely, a protruding belly button can be linked to infection or more complex abdominal wall conditions, but these are usually identified soon after birth and managed in hospital.
Signs of infection include redness spreading around the navel, yellow or green discharge, a foul smell, or tenderness. If you notice any of these, seek medical advice promptly.
Most outie belly buttons are harmless, but there are certain signs to look out for. Contact your GP or health visitor if you notice any of the following:
These signs don’t always mean something serious, but they do need checking to rule out infection or complications.
Many parents are surprised to find that an outie can change quite a lot during the first few years. As your baby grows, their abdominal wall strengthens and the tissues naturally pull inwards.
If the cause is a small hernia, it often resolves on its own by around age of 2-3. Doctors rarely recommend surgery unless it persists beyond that age or causes discomfort. If your baby’s outie is simply how their skin healed, it may stay that way into adulthood, which is perfectly fine and just another variation of normal.
It’s very important not to try to push the belly button in, tape it down, or use home remedies. These won’t help the healing process and could actually cause irritation or infection.
In the early weeks, while the cord stump is still attached or healing, focus on gentle hygiene:
Once the stump has fallen off, continue to monitor for any discharge or unusual swelling.
Remember: never apply plasters, coins, or pressure pads to an outie. These old-fashioned remedies don’t work and can make things worse.
There are plenty of myths about baby belly buttons, and they often make parents worry unnecessarily. Let’s clear a few up:
Yes, many newborns have a slightly raised or puffy navel in the early weeks. It often settles as the area heals and the muscles strengthen.
If it’s caused by a small hernia, it often closes naturally by the age of 2-3. If it’s simply how the skin healed, it may remain an outie, which is completely fine.
No, please don’t. It’s not safe and won’t make it go in faster.
Possibly. A soft bulge that gets larger when your baby cries could be a hernia, while a small pink moist lump might be a granuloma. Both are common and usually easy to manage.
If it’s red, painful, leaking, hard, or your baby seems unwell, get it checked. Otherwise, gentle observation is enough.
Most outie belly buttons are simply one of those charming quirks that make your baby unique. They rarely cause problems and often improve with time. Keep the area clean, avoid unnecessary treatments, and enjoy watching your baby grow.
If you’re ever unsure or would like tailored reassurance, you can always speak with your health visitor, GP, or pharmacist.
As a private health visitor, I also support families one-to-one through Essential Parenting, offering calm, evidence-based advice on everything from newborn care to sleep, feeding, and development. You can find out more or book a consultation at Essential Parenting.
