What could cause the navel to protrude?

Reviewed by Yoshinori Abe, MD

Internal Medicine

An outie belly button in adults is most often caused by an umbilical hernia, abdominal fluid buildup (ascites) linked to liver conditions, or weakened abdominal muscles. Pregnancy, sudden weight changes, and heavy lifting can also cause the navel to protrude.

Because a protruding navel can signal anything from a minor muscle strain to a serious underlying condition like liver disease, it's important not to guess. A free, instant, online symptom check can help you understand the likely cause based on your specific symptoms and guide you on the right next steps—whether that's monitoring at home or seeing a doctor promptly.

Reviewed for medical accuracy: 07/15/2026

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Explanation

When you notice your belly button sticking out more than usual, there are a few possible reasons. One common cause is an umbilical hernia. This happens when a small hole or weak spot in the muscles around the navel allows internal tissues or fat to push out. It is something that can occur in both children and adults.

Another reason could be fluid buildup in the abdomen, known as ascites, which is common in conditions like liver cirrhosis; the extra fluid can push the navel forward. Additionally, if there is a problem with one side of the abdominal wall, such as a weakening or muscle imbalance, it might cause the navel to shift or appear more prominent.

Sometimes changes in weight or scarring from previous surgeries can also alter the normal appearance of the belly button. If you notice a persistent change and it worries you, you can start by using a free symptom checker to help understand what might be causing your symptoms, though it's always important to follow up with a doctor who can perform an exam and decide if any treatment is necessary.

(References)

Coste AH, Bamarni S, Leslie SW. Umbilical Hernia. [Updated 2024 Feb 27]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK459312/
Granese J, Valaulikar G, Khan M, Hardy H 3rd. Ruptured umbilical hernia in a case of alcoholic cirrhosis with massive ascites. Am Surg. 2002 Aug;68(8):733-4. PMID: 12206611.
Shikino K, Miyahara M, Noda K, Ohira Y, Ikusaka M. Unilateral lower abdominal wall protrusion and umbilical deviation. Clin Case Rep. 2016 Feb 29;4(4):451-2. doi: 10.1002/ccr3.524. PMID: 27099750; PMCID: PMC4831406.

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