Umbilical Hernia

What is an Umbilical Hernia?

An umbilical hernia is a condition where a portion of abdominal tissue, fat, or intestine pushes through a weak spot in the abdominal muscles near the belly button (umbilicus). This weakness allows the internal contents of the abdomen to bulge outward, creating a visible or palpable lump around the navel.

Umbilical hernias occur when the opening in the abdominal wall that once allowed the umbilical cord to pass through during fetal development does not fully close or later becomes weakened. In many cases the hernia appears as a soft swelling at the belly button that may become more noticeable when a person coughs, strains, laughs, or stands.

Impact of Umbilical Hernia on Anatomy and Health

The abdominal wall is made up of layers of muscle and connective tissue that hold the organs of the abdomen in place. In a healthy abdominal wall these layers remain strong and intact, preventing organs such as the intestines from pushing outward.

With an umbilical hernia, a weakness develops in the fascia and muscle layers around the umbilical ring. This opening allows abdominal contents, such as fatty tissue or part of the small intestine, to protrude through the defect. The protrusion creates the visible bulge at the belly button.

The impact on health can vary depending on the size of the hernia and whether complications occur.

• Pressure on surrounding tissues: The hernia sac may place pressure on nearby structures in the abdominal wall, causing discomfort or pain.
• Changes in abdominal function: Large hernias may alter how the abdominal wall supports internal organs and distributes pressure during movement or lifting.
• Digestive symptoms: If the intestine becomes involved in the hernia, some people may experience nausea, constipation, or abdominal discomfort.
• Risk of incarceration: The herniated tissue may become trapped and unable to return into the abdomen. This condition is called incarceration.
• Risk of strangulation: In severe cases, blood supply to the trapped intestine can be cut off. This is known as strangulation and requires urgent medical treatment.

For many people, the most noticeable effect is the visible lump at the navel. While small hernias may cause minimal symptoms, larger hernias can interfere with daily activities and physical movement.

Risk Factors for Umbilical Hernia

Umbilical hernias can affect people of any age, but certain groups have a higher risk due to differences in abdominal wall strength or pressure within the abdomen.

• Infants and newborns: Babies are commonly affected because the umbilical opening in the abdominal wall may not fully close after birth. Premature infants have a higher risk.
• Adults over the age of 40: Age-related weakening of muscles and connective tissue can increase the risk of developing a hernia.
• People with obesity: Excess body weight increases pressure inside the abdomen, which can push tissue through weak areas of the abdominal wall.
• Pregnant women: Pregnancy stretches and weakens the abdominal muscles, making umbilical hernias more likely. Multiple pregnancies may further increase the risk.
• Individuals with chronic cough: Persistent coughing can repeatedly strain the abdominal muscles.
• People with fluid in the abdomen (ascites): This condition increases pressure inside the abdominal cavity.
• Those who perform heavy lifting: Frequent straining during lifting can weaken the abdominal wall over time.
• Individuals with previous abdominal surgery: Surgical incisions may weaken nearby tissue.

Understanding these risk factors can help identify individuals who may benefit from early medical assessment if symptoms appear.

Causes of Umbilical Hernia

Umbilical hernias develop when there is a combination of weakness in the abdominal wall and increased pressure within the abdomen. Several factors can contribute to this process.

• Incomplete closure after birth: In infants, the abdominal muscles may not completely close around the umbilical opening. This leaves a small gap through which tissue can protrude.
• Muscle weakness in the abdominal wall: In adults, the tissues around the navel can gradually weaken over time due to ageing or previous strain.
• Increased abdominal pressure: Activities or conditions that increase internal abdominal pressure can push tissue through a weak area.
• Pregnancy: Stretching of the abdominal wall during pregnancy can weaken the muscles around the umbilicus.
• Obesity: Excess weight places continuous pressure on the abdominal muscles.
• Chronic coughing or sneezing: Repeated forceful coughing increases strain on the abdominal wall.
• Straining during bowel movements: Conditions that cause chronic constipation may contribute to hernia development.
• Heavy lifting: Regular lifting without proper technique can place significant pressure on the abdominal muscles.

Symptoms of Umbilical Hernia

Some individuals may have minimal symptoms, while others experience noticeable discomfort.

• Visible bulge near the belly button: The most common sign is a soft swelling or lump at the navel. This bulge may become more noticeable when standing, coughing, or straining.
• Discomfort or mild pain: Some people experience aching or pressure around the belly button, particularly during physical activity.
• Bulge that disappears when lying down: In many cases the hernia can be gently pushed back into the abdomen when relaxed.
• Increasing size over time: Umbilical hernias may gradually enlarge as abdominal pressure continues to push tissue outward.
• Tenderness around the hernia: The area may feel sensitive when touched.

More serious symptoms can occur if complications develop.

• Severe abdominal pain
• Nausea or vomiting
• Redness or discolouration of the bulge
• A hernia that cannot be pushed back in

These symptoms may indicate incarceration or strangulation and require urgent medical attention.

Preventing Umbilical Hernia

While not all umbilical hernias can be prevented, especially those present from birth, several lifestyle measures may reduce the risk of developing a hernia or prevent an existing one from worsening.

• Maintain a healthy body weight: Reducing excess body weight helps decrease pressure on the abdominal wall.
• Strengthen abdominal muscles: Core-strengthening exercises can support the abdominal wall and improve muscle stability.
• Avoid heavy lifting without proper technique: When lifting objects, bending at the knees and engaging the core muscles can help reduce strain.
• Treat chronic cough: Managing respiratory conditions can reduce repeated stress on the abdominal muscles.
• Prevent constipation: A diet rich in fibre and adequate fluid intake can reduce straining during bowel movements.
• Gradually return to activity after surgery: Allowing sufficient healing time after abdominal surgery helps prevent weakness in the abdominal wall.

Types of Umbilical Hernia

Umbilical hernias can be classified into several types depending on when they occur, how the hernia develops, and whether complications are present. 

• Congenital Umbilical Hernia: This type occurs in infants and newborns. During fetal development, the umbilical cord passes through a small opening in the abdominal wall. Normally this opening closes shortly after birth. If it remains partially open, abdominal tissue may protrude through the weak area. Congenital umbilical hernias are common in babies and often resolve naturally within the first few years of life as the abdominal muscles strengthen.
• Acquired Umbilical Hernia: This type develops later in life, usually in adulthood. It occurs when the tissues around the belly button weaken over time and increased abdominal pressure pushes fat or intestine through the defect. Acquired hernias are more common in adults who are overweight, pregnant, or frequently lift heavy objects.
• Reducible Umbilical Hernia: In this type, the bulging tissue can be gently pushed back into the abdomen. The hernia may appear when standing, coughing, or straining and disappear when lying down. Reducible hernias are often less urgent but still require monitoring as they may enlarge over time.
• Incarcerated Umbilical Hernia: This occurs when the herniated tissue becomes trapped and cannot return to the abdominal cavity. The trapped tissue may cause pain and discomfort and can lead to digestive symptoms. Incarcerated hernias require prompt medical evaluation because they may progress to more serious complications.
• Strangulated Umbilical Hernia: This is the most serious form of umbilical hernia. In this situation, the blood supply to the trapped tissue is cut off. Without blood flow, the tissue can become damaged or die. Strangulated hernias are considered a medical emergency and usually require urgent surgical treatment.

Understanding the type of umbilical hernia helps doctors determine whether observation, monitoring, or surgical repair is the most appropriate approach.

Diagnosis of Umbilical Hernia

Umbilical hernias are usually diagnosed through a clinical assessment by a healthcare professional. The evaluation focuses on identifying the presence of a bulge near the belly button and determining whether complications are present.

• Medical history: The doctor will ask about symptoms such as pain, swelling, changes in the size of the bulge, and activities that worsen the condition. Risk factors such as pregnancy, obesity, or heavy lifting may also be discussed.
• Physical examination: During the examination, the doctor will inspect and gently feel the area around the belly button. Patients may be asked to cough, strain, or stand to make the hernia more visible. The doctor may also check whether the hernia can be pushed back into the abdomen.
• Ultrasound imaging: An ultrasound may be used to confirm the presence of a hernia and evaluate the size of the defect in the abdominal wall. This imaging technique uses sound waves to create images of internal structures.
• CT scan or MRI: In more complex cases, especially when complications are suspected, advanced imaging may be recommended. These scans provide detailed views of the abdominal wall and surrounding organs.
• Assessment for complications: The doctor will check for signs of incarceration or strangulation, such as severe pain, tenderness, or skin changes around the hernia.

In many cases, diagnosis can be made based on physical examination alone, particularly when the hernia is clearly visible.

Treatment for Umbilical Hernia

In adults, surgery is often recommended because the hernia rarely resolves on its own.

• Observation and monitoring: Small hernias that cause minimal symptoms may be monitored by a doctor. Regular check-ups allow the healthcare provider to assess whether the hernia is increasing in size or causing new symptoms.
• Lifestyle modifications: Managing body weight, avoiding heavy lifting, and treating chronic cough or constipation may help reduce strain on the abdominal wall.
• Surgical repair: Surgery is the most effective treatment for most adult umbilical hernias. The goal of surgery is to return the protruding tissue to the abdominal cavity and close the weakness in the abdominal wall.
• Open hernia repair: In this procedure, the surgeon makes a small incision near the belly button, returns the tissue to its normal position, and repairs the muscle defect. A surgical mesh may be used to strengthen the abdominal wall and reduce the risk of recurrence.
• Laparoscopic hernia repair: This minimally invasive technique uses small incisions and specialised instruments with a camera. The surgeon repairs the hernia from inside the abdomen and usually reinforces the repair with mesh.
• Emergency surgery: If the hernia becomes strangulated or incarcerated, urgent surgery may be required to restore blood supply to the affected tissue and prevent further complications.

Recovery from hernia surgery is generally straightforward, with many patients returning to normal activities within a few weeks.

What if an Umbilical Hernia is Untreated?

If an umbilical hernia is left untreated, the condition may gradually worsen over time. While some small hernias remain stable, many enlarge due to ongoing pressure within the abdomen.

Several complications may occur if treatment is delayed.

• Increasing size of the hernia: The opening in the abdominal wall may become larger, causing the bulge to grow and become more noticeable.
• Persistent discomfort or pain: As the hernia enlarges, individuals may experience increasing pressure or pain during daily activities.
• Incarceration: The herniated tissue may become trapped outside the abdominal wall and cannot be pushed back inside. This can cause swelling and tenderness.
• Strangulation: If blood flow to the trapped tissue is cut off, the tissue may become damaged or die. This is a medical emergency that requires immediate surgery.
• Bowel obstruction: If a portion of the intestine becomes trapped in the hernia, the normal movement of digestive contents may be blocked, leading to severe abdominal pain, vomiting, and constipation.

Early medical evaluation can help identify hernias before complications develop. For many adults, planned surgical repair is recommended to prevent the risk of emergency situations and to restore the strength of the abdominal wall.