Umbilical Hernia: Symptoms, Surgery, and Causes

What is Umbilical Hernia?

Umbilical hernias are among the most common hernias encountered in clinical practice, particularly in newborns and young children. They are especially prevalent in cases of premature birth. An umbilical hernia typically presents as a soft, painless bulge near the navel (belly button) that may become more visible during activities that increase intra-abdominal pressure, such as laughing, coughing, crying, or straining during a bowel movement. It tends to reduce or disappear when the child lies down and relaxes.

In many infants, umbilical hernias resolve completely on their own before the child’s first birthday, without causing complications. However, they can also develop in adults, and in this age group, without appropriate treatment, they will almost invariably worsen over time.

Hernias are common conditions that can affect men and women of all ages. If you have been diagnosed with an umbilical hernia, your doctor may have recommended surgery. When indicated, surgical repair allows the herniated tissue to be repositioned correctly and the weakened abdominal wall to be strengthened. This procedure typically offers an excellent prognosis, though recurrence remains possible.

Surgery is generally recommended when:

• The hernia is large
• It has not resolved spontaneously by the age of 3–4 years
• It is present in an adult

Before the age of 3–4 years, the risk of complications in children is very low, and watchful waiting is the preferred approach. In adults, however, surgery is recommended for most patients, as spontaneous improvement is unlikely and the risk of complications increases with time.

The Anatomy of a Hernia

The abdominal organs, such as the stomach and intestines, are contained within the abdominal cavity. They are protected by three concentric layers.

1. The peritoneum is a thin, smooth membrane that directly covers the abdominal organs
2. The muscular wall is a multi-layered structure of muscles and their fibrous sheaths, known as fascia, which provides structural support
3. The skin is the outermost protective layer

A hernia occurs when the muscular wall weakens, leading to a defect. Through this opening, the intestines or omental fat, still enclosed by the peritoneum, can protrude. This forms a visible or palpable bulge under the skin.

Classification of Abdominal Hernias

Abdominal hernias are broadly classified as follows:

Abdominal wall hernias:

• Inguinal hernia: Most common type overall; more frequent in men; protrudes through the inguinal canal and may extend into the scrotum
• Femoral hernia: Protrudes below the inguinal ligament, between the iliac spine and the pubic bone
• Epigastric hernia: Passes through a weakness in the upper rectus abdominis muscles
• Spigelian hernia: A rare hernia forming near the inferior epigastric vessels
• Lumbar hernia: Forms posteriorly at two points of weakness in the back muscular wall
• Umbilical hernia: Particularly common in obese patients or those with ascites

Inguinal hernias are by far the most prevalent type. Also notable are post-laparotomy hernias (laparocele), which are hernias that develop at the site of a prior abdominal surgical incision.

This article focuses specifically on umbilical hernias.

An umbilical hernia affects the area around the navel. Although it is usually congenital (present from birth), it may not become clinically apparent or problematic until adulthood. It is a very common condition in newborns, especially those born prematurely.

---

Causes

In Newborns and Children

During fetal development, the umbilical cord passes through a small opening in the abdominal muscles. Normally, this opening closes completely shortly before or after birth. If it fails to close properly, the underlying weakness allows abdominal content to protrude, forming a congenital umbilical hernia. This is especially common in premature infants, whose abdominal wall has had less time to fully develop.

In Adults

In adults, umbilical hernias are acquired. The abdominal wall weakens gradually over time because of cumulative stress. Contributing mechanisms include:

• Heavy lifting can cause repetitive strain on the abdominal wall muscles.
• Progressive weakening of muscular fascia occurs because of prolonged stretching and aging.

Once established, hernias typically grow larger over time. This progression increases the risk of serious complications, particularly incarceration and strangulation. In these conditions, loops of intestine may become trapped, twisted, and lose their blood supply. This can lead to bowel necrosis and requires urgent, complex, high-risk surgery.

Surgery is the only definitive way to correct an umbilical hernia.

Principal Risk Factors in Adults

---

Symptoms

The most characteristic symptom of an umbilical hernia is the visible bulge at or near the navel. Key features include:

• The bulge is typically soft and reducible, meaning it can be gently pushed back into the abdomen with finger pressure
• It increases in size with actions that raise intra-abdominal pressure: coughing, crying, laughing, straining during defecation, or standing for long periods
• It tends to shrink or disappear when lying down and relaxing

In the majority of cases, umbilical hernias are completely asymptomatic. The patient notices the bulge but experiences no pain or discomfort.

When symptoms do occur, they typically include:

• Abdominal pain or discomfort, especially when the abdominal wall presses on the hernia contents during exertion
• A sensation of dragging or pressure at the navel
• Discomfort that worsens with heavy lifting or straining

Important: Any change in the character of an umbilical hernia, especially if it becomes suddenly painful, hard, red, or cannot be pushed back, may signal a dangerous complication. This situation requires urgent medical evaluation.

---

Complications

Umbilical hernias can lead to serious complications, particularly in adults and in cases of larger hernias. The two main complications are:

1. Intestinal Obstruction (Incarceration)

A segment of intestine becomes trapped outside the abdominal wall, creating a blockage to the normal flow of bowel contents. This causes:

• Obstruction: the intestinal lumen is effectively blocked
• Nausea, vomiting, and abdominal pain can occur when bowel contents back up
• Inability to pass gas or stool

This condition requires urgent surgical evaluation and intervention.

2. Strangulation

A strangulated hernia occurs when the blood supply to the trapped intestinal segment is completely cut off, leading to progressive tissue ischemia and necrosis (death of bowel tissue). This is a life-threatening surgical emergency that must be treated within a few hours to restore circulation and prevent bowel gangrene, perforation, and sepsis.

Signs of strangulation include sudden intense pain at the hernia site, the hernia becoming firm and irreducible, accompanied by fever, vomiting, and rapid deterioration of general condition. Call emergency services immediately.

---

Diagnosis

The identification of an umbilical hernia is primarily a clinical process based on careful physical examination by a physician (typically a general surgeon). In the vast majority of cases, the diagnosis can be made confidently without imaging.

Physical Examination

During the clinical visit, the physician evaluates:

• Location: Whether the bulge is at, above, or below the navel.
• Size: Estimated dimensions of both the hernia itself and the hernia gate (the muscular defect).
• Reducibility: Whether the hernia content can be gently pushed back into the abdominal cavity. This is a critical feature that distinguishes a simple hernia from an incarcerated one.
• Tenderness: Painful hernias warrant greater urgency.

To make the hernia more visible, the patient may be asked to cough or perform a Valsalva maneuver (straining as if having a bowel movement) while standing or lying down. This temporarily increases intra-abdominal pressure and clearly reveals the hernia’s behavior.

A key finding during palpation is the size of the hernia gate:

• A large gate means the hernia protrudes and reduces easily, but carries a lower risk of strangulation
• A small, narrow gate means the hernia is less likely to protrude but carries a higher risk of incarceration and strangulation if it does

Imaging and Diagnostic Tests

Although clinical diagnosis is usually sufficient, imaging may be requested in selected cases:

• Abdominal wall ultrasound: The first-line imaging study. It precisely defines the size of the hernia gate and the nature of the hernia contents (fatty omentum vs. intestinal loops). Particularly useful in obese patients where palpation is difficult.

• CT scan of the abdomen: Reserved for complex cases, large hernias, or suspected complications (e.g., intestinal obstruction or strangulation). Provides a detailed anatomical map essential for surgical planning.

• Blood tests: Not diagnostic for the hernia itself, but routinely ordered pre-operatively to assess general health, kidney and liver function, and coagulation. In emergency cases with suspected strangulation, an elevated white blood cell count and elevated inflammatory markers may indicate intestinal ischemia.

Differential Diagnosis

Umbilical hernias must be distinguished from conditions that can mimic their presentation, including:

• Epigastric hernia: located above the navel along the linea alba.
• Rectus abdominis diastasis is a separation of the abdominal muscles that does not involve a true fascial defect. This condition does not carry the same risk of complications.
• Subcutaneous lipoma: a benign fatty lump beneath the skin. It is soft, mobile, and non-reducible.
• Umbilical granuloma or infection, particularly in newborns, requires attention.

---

Treatment

The therapeutic approach differs significantly between children and adults, but the overarching goal is the same: eliminate the anatomical defect and prevent the serious complications of strangulation and incarceration.

Approach in Children

In infants and young children, the preferred initial approach is watchful waiting (active surveillance). The vast majority of congenital umbilical hernias, especially those with a hernia gate smaller than 1.5 cm, close spontaneously within the first 2 to 4 years of life. This happens as the abdominal wall muscles naturally strengthen.

Surgical repair in children is indicated only when:

• The hernia persists beyond 4–5 years of age
• The hernia gate is unusually large (greater than 1.5–2 cm)
• The hernia causes significant pain or recurrent discomfort
• Complications occur, such as incarceration or strangulation, though these are rare in this age group

Important: Home remedies, such as taping a coin or piece of fabric over the navel, are ineffective and potentially harmful. They do not accelerate hernia closure and may instead cause skin irritation or infection. They should not be used.

Treatment in Adults

In adults, spontaneous resolution is essentially impossible. Current clinical guidelines recommend surgical repair for virtually all symptomatic umbilical hernias and for asymptomatic ones of significant size, given the progressive risk of incarceration.

Surgical Options

1. Open (Traditional) Repair

The most widely performed technique. A small curved incision is made at the base of the navel, following its natural contour for a cosmetically acceptable result. The surgeon:

1. Exposes and dissects the hernia sac
2. Repositions the herniated content back into the abdominal cavity
3. Closes the fascial defect

If the hernia gate is larger than 1–2 cm, a synthetic mesh (biocompatible prosthetic net) is placed to reinforce the repair without placing tension on the surrounding tissues. Mesh repair dramatically reduces the risk of recurrence compared to suture-only repair (recurrence rates with mesh: approximately 1–3% vs. up to 10–15% without mesh).

2. Laparoscopic Repair

Performed through three small incisions (5–12 mm) using a camera and thin instruments. The mesh is placed from inside the abdomen against the posterior surface of the abdominal wall (intraperitoneal position).

Advantages of laparoscopic repair:

• Significantly less post-operative pain
• Faster recovery and return to normal activities
• Better results for large, complex, or recurrent hernias
• Particularly useful in obese patients and those with multiple abdominal wall defects

3. Robotic-Assisted Surgery

An advanced evolution of laparoscopy. The surgeon operates using a robotic platform that provides enhanced three-dimensional visualization and greater precision in suturing and mesh placement. Particularly valuable in complex cases requiring meticulous reconstruction.

Anesthesia: The procedure is typically performed under general anesthesia. For selected cases involving small hernias in appropriate candidates, local anesthesia with sedation may be considered.

Lifestyle and Prevention

Although surgery is the only definitive cure, lifestyle management is essential both before and after the operation to ensure long-term success and minimize surgical risk:

• Weight control: Obesity significantly increases intra-abdominal pressure, placing continuous stress on sutures and mesh. Losing weight before elective surgery noticeably improves outcomes and reduces the risk of recurrence.

• Safe lifting technique: Avoid excessive loads; when lifting is necessary, use leg strength rather than abdominal effort, and keep the load close to the body.

• Intestinal regularity: A high-fiber diet, combined with adequate hydration, helps prevent constipation and excessive straining during bowel movements. This reduces repeated pressure on the umbilical area, a common issue in such cases.

• Management of chronic cough: In smokers or patients with chronic bronchitis, treating persistent cough is essential. Repeated forceful coughing strains the abdominal wall and can compromise surgical repair.

• Smoking cessation: Nicotine impairs tissue healing, weakens connective tissue, and promotes chronic cough. All of these factors can negatively affect hernia repair outcomes.

Post-Operative Recovery

The majority of patients are discharged on the same day as the operation (day surgery) or after a single night of observation.

Typical Recovery Timeline

Warning Signs to Watch For

Contact your doctor immediately if you experience:

• Fever (above 38°C / 100.4°F) may indicate an infection
• Intense redness, warmth, or swelling at the wound site
• Purulent discharge (pus) from the incision
• Pain that does not respond to prescribed analgesics
• New or worsening abdominal bulge at the surgical site (possible recurrence)
• Nausea, vomiting, or inability to pass gas (possible bowel obstruction)

These signs may indicate a wound infection, mesh infection, or another complication requiring prompt evaluation.

---

Frequently Asked Questions

When Is Surgery Necessary for an Umbilical Hernia?

In adults: Surgery is recommended for virtually all symptomatic umbilical hernias and for asymptomatic ones of meaningful size, given the progressive nature of the condition and the risk of strangulation. Spontaneous resolution in adults does not occur.

In children: The standard approach is watchful waiting until at least 3–4 years of age, as the majority of congenital umbilical hernias close spontaneously during this period. Surgery is indicated only if the hernia persists beyond this age, is very large, or causes significant symptoms. The risk of serious complications in young children is very low, justifying the expectant approach.

Can an Umbilical Hernia Resolve Without Surgery?

In infants and toddlers, spontaneous closure happens in most cases before the age of 4. In adults, umbilical hernias do not resolve on their own. Instead, they will gradually enlarge over time.

Is Umbilical Hernia Surgery Dangerous?

Umbilical hernia repair is a safe, commonly performed procedure with an excellent overall prognosis. As with any surgical intervention, risks exist (infection, hematoma, recurrence, anesthesia-related effects), but serious complications are rare in elective settings. Emergency surgery for strangulation carries higher risks, reinforcing the importance of timely elective repair.

How Long Is Recovery After Umbilical Hernia Surgery?

Most patients return to light daily activities within 1–2 weeks. Full recovery, which includes returning to strenuous physical work or exercise, typically takes 4–6 weeks. Your surgeon will provide personalized guidance based on the complexity of the repair.