An outie is a belly button that protrudes outward instead of dipping inward. About 10% of people have one. It’s not a medical condition or a sign that something went wrong at birth. It’s simply the result of how your skin healed after your umbilical cord fell off.
How Outies Form
Every belly button is a scar. When you were born, your umbilical cord was clamped and cut, leaving a small stump attached to your abdomen. That stump typically dries up and falls off within one to three weeks. The skin underneath then heals over, and the shape it takes as it closes becomes your belly button for life.
If the scar tissue settles flat or below the surrounding skin, you get an innie. If it heals in a way that pushes the tissue outward, you get an outie. The shape is determined entirely by how your individual skin heals during those first weeks, not by anything the doctor or midwife did. How the cord was clamped or cut has no effect on the final shape.
Outies vs. Umbilical Hernias
A common source of confusion: not every protruding belly button is a simple outie. Some are caused by an umbilical hernia, where a small gap in the abdominal wall muscles allows tissue or fluid to push through. In babies, these hernias are usually harmless and often close on their own. In adults, they can develop from strain, obesity, or pregnancy.
The key difference is structural. A true outie is just extra scar tissue sitting on the surface. An umbilical hernia involves a gap in the muscle layer beneath the skin, and you can sometimes feel the edges of that opening. Hernias also tend to bulge more when you cough, strain, or bear down, and they can often be gently pushed back in. A plain outie stays the same size regardless of what you’re doing.
Most umbilical hernias cause no symptoms and don’t need treatment. Rarely, tissue can become trapped in the gap and lose its blood supply, which is a medical emergency. Warning signs include sudden severe pain at the belly button, nausea and vomiting, and skin around the bulge turning red, pale, or darker than usual.
Outies in Newborns
Parents sometimes notice a small red, moist lump at the belly button after the cord stump falls off. This is likely an umbilical granuloma, which is the most common type of umbilical mass in newborns, occurring in roughly 1 out of every 500 births. It looks like a soft pink or red bead of tissue, often slightly wet with clear or yellowish fluid.
A granuloma isn’t the same as a permanent outie. It’s extra tissue that formed during healing and can be treated easily, usually by applying silver nitrate in a clinic visit or, in some cases, with a simple salt compress at home. Once treated, the belly button typically heals flat.
Can Your Belly Button Change Shape?
Pregnancy is the most common reason an innie temporarily becomes an outie. As the uterus expands, it puts increasing pressure on the abdominal wall from the inside, stretching the skin until the belly button pops outward. This is completely normal and, for most people, reverses after delivery. The belly button gradually returns to its original shape as the abdominal wall recovers.
Significant weight gain or abdominal surgery can also change the appearance of a belly button, sometimes permanently. And aging naturally loosens skin, which can shift the shape over time.
Keeping an Outie Clean
Outies are actually easier to keep clean than innies. Because they protrude, they’re exposed to open air and don’t trap moisture and debris the way a deep innie does. All you need is mild, fragrance-free soap and water. Lather gently with your hands or a soft washcloth, rinse, and dry the area. No special tools or products required.
Skipping belly button hygiene entirely can lead to odor, irritation, or yeast infections. The fungus that naturally lives on your skin thrives in warm, moist, neglected spots, and an unwashed belly button qualifies. Signs of a yeast infection include redness, itching, swelling, and sometimes a whitish discharge.
Cosmetic Reshaping
Some people with outies choose to have them surgically reshaped through a procedure called umbilicoplasty. This is a cosmetic surgery, not a medical necessity. The surgeon reshapes the existing tissue and secures it below the skin surface to create the appearance of an innie. It’s a relatively minor outpatient procedure, sometimes performed on its own and sometimes as part of a tummy tuck.
People also seek umbilical reconstruction after hernia repair, tumor removal, or other abdominal surgeries that altered or removed the belly button entirely. Several surgical techniques exist, but they all aim to create a natural-looking, slightly recessed navel. The absence of a belly button tends to draw more attention than an unusual one, which is often the main motivation for reconstruction.