Ventral Hernia
Ventral hernia is the umbrella term for any hernia occurring through the front wall of the abdomen, as distinguished from hernias in the groin. The category includes hernias arising at natural weak points—the navel, the midline above it, and the semilunar line at the outer edge of the abdominal muscles—as well as incisional hernias, which develop through the scar of a previous abdominal operation and are by far the most common type in adults. Ventral hernias do not close on their own, tend to enlarge over time, and range from small defects noticed only on imaging to large, complex hernias that significantly affect daily function. Diagnosis is often made on examination, with CT the primary imaging test for sizing the defect, assessing its contents, and planning repair.
What is it?
The abdominal wall is a layered structure of muscle and fascia that contains the abdominal organs, maintains posture, generates the pressure needed for coughing and lifting, and protects what lies beneath. A ventral hernia is a defect in this front wall through which abdominal contents protrude—most often preperitoneal fat or omentum, and in larger defects loops of bowel.
The term is broad by design. Ventral hernia describes location rather than a single condition: any hernia of the anterior abdominal wall, in contrast to inguinal and femoral hernias, which occur in the groin. Several distinct types fall under the heading, and they differ in cause, natural history, and repair strategy.
Incisional hernias develop through the scar of a previous abdominal operation, where the fascial closure has failed or stretched. They are the most common ventral hernia in adults and the reason the category is so clinically significant. The defect may appear within months of surgery or many years later. Any incision can be affected, though midline laparotomy incisions are the most frequent site, and laparoscopic port sites—particularly larger ports and those at the umbilicus—can also develop hernias. A parastomal hernia is a specific variant occurring alongside a colostomy or ileostomy, where the abdominal wall opening created for the stoma enlarges.
Umbilical hernias occur at the navel, where the abdominal wall has no muscle. In adults these are acquired, associated with obesity, pregnancy, and ascites, and are covered in more depth on our dedicated Umbilical Hernia page.
Epigastric hernias occur in the midline between the navel and the breastbone, through small defects in the linea alba—the fibrous seam where the abdominal muscles meet. They are often small, frequently contain only fat rather than bowel, and can be disproportionately painful for their size because fat becomes pinched in a narrow defect.
Spigelian hernias are uncommon and occur through the semilunar line, at the lateral edge of the rectus abdominis muscle, usually in the lower abdomen. They characteristically develop between muscle layers rather than pushing outward to the skin, which means they may produce pain without any visible or palpable bulge. This makes them easy to miss on examination and a classic indication for imaging.
Lumbar hernias occur through defects in the posterior-lateral abdominal wall and are rare, arising congenitally, after trauma, or following flank surgery.
Understanding why incisional hernias form explains most of what follows in management. Healing of a fascial closure depends on collagen deposition and remodeling over weeks to months. Anything that impairs this process, or that mechanically stresses the closure before it is strong, increases the risk that the repair fails and a defect develops.
The principal risk factors are therefore both biological and mechanical. Obesity increases tension on the closure and impairs healing, and is among the strongest predictors. Wound infection is a major contributor, since infected tissue heals poorly. Smoking impairs collagen metabolism and tissue oxygenation. Diabetes, particularly when poorly controlled, impairs wound healing. Malnutrition and low protein stores limit the raw material for repair. Corticosteroids and some immunosuppressants suppress the healing response. Chronic cough, chronic constipation with straining, ascites, and heavy lifting mechanically stress the closure. Emergency operations, contaminated surgery, repeat operations through the same incision, and connective tissue disorders such as Ehlers-Danlos and Marfan syndromes all raise risk. Abdominal aortic aneurysm is independently associated with incisional hernia, reflecting a shared underlying disturbance of connective tissue.
Surgical technique also matters considerably. Contemporary evidence supports closing midline incisions with a continuous small-bites technique using slowly absorbable suture at a specific suture-to-wound-length ratio, which reduces incisional hernia rates compared with traditional large-bites closure. Prophylactic mesh placement at the time of closure is used in selected high-risk patients.
Ventral hernias are also described by size and complexity, and this language appears frequently in surgical discussions. Defect width is the most important single measurement, since it determines whether the midline can be closed directly and which repair techniques are feasible. Loss of domain describes a large hernia in which a substantial proportion of the abdominal contents reside outside the abdominal cavity within the hernia sac; returning them can raise pressure inside the abdomen dangerously, and these cases require specialized planning.
The terminology describing a hernia’s status determines urgency and is consistent across hernia types.
A reducible hernia is one whose contents can be pushed back into the abdomen, spontaneously on lying down or with gentle pressure. This is the usual state and is not an emergency.
An incarcerated hernia is one whose contents have become trapped and cannot be reduced. This does not by itself mean the blood supply is compromised, but it carries a risk of progression and of bowel obstruction if intestine is involved.
A strangulated hernia is one in which blood supply to the trapped tissue has been cut off, leading to ischemia and, without prompt treatment, tissue death. This is a surgical emergency.
Notably, the relationship between size and risk is not straightforward. Small, narrow-necked defects tend to trap contents more readily than large ones, because the opening is tight relative to what passes through it. Large hernias with wide necks are less likely to strangulate but cause more functional impairment and are technically harder to repair.
Symptoms range widely. Many small ventral hernias cause no symptoms and are found incidentally on CT performed for another reason. Where symptoms occur, patients typically describe an aching or dragging discomfort at the site, worse with standing, lifting, or exertion and relieved by lying down. Some report a pulling or tearing sensation with core movements.
Large hernias produce a distinct set of problems beyond the bulge itself. When a substantial portion of the abdominal wall no longer functions as a unit, patients can develop back pain and postural changes, difficulty with lifting and rising from a seated position, altered breathing mechanics, skin irritation or breakdown in the fold over the hernia, and significant effects on body image, clothing, and daily activity. These functional consequences are often what drives patients to seek repair, and they are a legitimate indication independent of any risk of strangulation.
Signs suggesting incarceration or strangulation include a bulge that has become firm, tender, and irreducible; increasing or severe pain; redness or discoloration of the overlying skin; nausea and vomiting; abdominal distension; and inability to pass gas or stool. These require emergency evaluation.
Diagnosis combines examination and imaging.
Physical examination identifies many ventral hernias, typically with the patient lying flat and lifting the head and shoulders or performing a Valsalva maneuver to tense the abdominal wall and make a defect palpable. Examination is considerably less reliable in patients with obesity, for small defects, for spigelian and other interparietal hernias that do not reach the skin, and in abdomens with extensive prior surgery.
CT of the abdomen and pelvis is the primary imaging test and the standard for surgical planning. It defines the number, location, and precise dimensions of every defect—multiple defects along an incision are common and are frequently missed clinically—along with the contents of the sac, the condition and thickness of the remaining muscle, the position of any existing mesh, the presence of bowel obstruction or ischemia, and the volume of herniated contents relative to the abdominal cavity, which is essential for identifying loss of domain. This level of anatomical detail directly determines which repair technique is appropriate, which is why CT is routinely obtained before complex repairs.
Ultrasound is useful for small or equivocal defects, can be performed dynamically with straining, and avoids radiation. It is more limited for large or complex hernias and is operator-dependent.
MRI provides excellent soft tissue detail and is used selectively, including for evaluating pain after mesh repair and for assessing muscle quality.
Blood tests do not diagnose hernia but assess infection, ischemia, glycemic control, and nutritional status—all directly relevant to planning and to whether a patient is ready for elective repair.
The differential diagnosis includes diastasis recti, which is stretching of the linea alba between the rectus muscles rather than a true fascial defect and produces midline bulging without a discrete hole; abdominal wall lipoma, hematoma, or abscess; rectus sheath hematoma; desmoid tumor and other abdominal wall masses; and abdominal wall metastasis, including at port sites after cancer surgery.
Important to Know
Ventral hernia repair spans an unusually wide range of complexity—from a straightforward day-surgery procedure for a small defect to a major reconstruction requiring days in hospital and months of recovery. Matching the operation to the hernia and to the patient is the central task. Care is typically coordinated by general surgeons, with specialized abdominal wall reconstruction surgeons involved for complex cases.
Observation is reasonable for small asymptomatic hernias and for patients whose surgical risk is high. Unlike inguinal hernia, the evidence base for watchful waiting in ventral hernia is limited, and most defects enlarge over time, making later repair more difficult. The decision balances current symptoms, defect size and trajectory, the patient’s operative risk, and the fact that emergency repair after incarceration carries substantially worse outcomes than planned repair.
Preoperative optimization is not a formality in this condition—it materially changes outcomes and is frequently required before elective repair. Weight loss meaningfully reduces recurrence and wound complications, and many surgeons set a BMI threshold before offering elective complex repair. Smoking cessation for a defined period before surgery is commonly required, since smoking substantially raises recurrence and wound complication rates. Glycemic control, nutritional repletion, treatment of chronic cough, and control of ascites where present all improve results. Patients sometimes find these requirements frustrating, but they exist because a repair performed under poor conditions is likely to fail.
Mesh reinforcement is standard for the great majority of adult ventral hernia repairs. Suture-only repair has markedly higher recurrence rates, and mesh distributes tension across a broader area of the abdominal wall. Mesh may be synthetic—the most common choice—or biologic and biosynthetic in contaminated fields, though evidence for the superiority of biologic mesh in contamination is weaker than once assumed and practice has moved toward selective use.
Where the mesh is placed matters. Retromuscular (sublay) placement, positioning mesh behind the rectus muscles and in front of the posterior fascia, has become the preferred plane in much of contemporary practice, associated with low recurrence and avoidance of direct contact between mesh and bowel. Preperitoneal, onlay, and intraperitoneal placements each have specific roles. Intraperitoneal mesh requires a barrier-coated product because of the risk of adhesion and, rarely, erosion into bowel.
Minimally invasive repair—laparoscopic and increasingly robotic—reduces wound complications and shortens recovery compared with open surgery and is well suited to small and moderate defects. Robotic platforms have expanded the range of defects that can be addressed with retromuscular mesh placement through minimally invasive access.
Component separation techniques are used for large defects where the midline cannot otherwise be closed. These operations release one of the abdominal wall muscle layers—either through anterior component separation or posterior approaches such as transversus abdominis release—to allow the fascia to be brought together without excessive tension. They are substantial operations, generally performed at centers with specific expertise, and are typically preceded by careful CT-based planning. Botulinum toxin injection of the lateral abdominal wall muscles before surgery, and preoperative progressive pneumoperitoneum, are adjuncts used in selected cases of loss of domain to make closure achievable.
Recovery varies enormously with the operation performed. Small repairs are often day surgery with return to most activity within a few weeks. Complex reconstructions involve several days in hospital, drains, and a graduated return to activity over two to three months, with abdominal binder use and physical therapy in many protocols.
Complications include seroma, which is common after large repairs and usually self-limiting; hematoma; wound infection; surgical site occurrence requiring intervention; mesh infection, which is uncommon but serious and may require mesh removal; bowel injury; ileus; chronic pain; and recurrence. Recurrence rates for ventral hernia repair remain higher than for inguinal repair, particularly for large, recurrent, and contaminated cases, which is why prevention and optimization receive so much emphasis.
Emergency management applies when a hernia becomes incarcerated or strangulated. Gentle reduction may be attempted by a clinician for a recently incarcerated hernia without signs of strangulation, but this should never be attempted at home. Strangulation requires emergency surgery with resection of any non-viable bowel, and repair in this contaminated, urgent setting carries higher risk and often requires modified technique.
Prevention has become an active area of surgical practice. For patients undergoing abdominal surgery, contemporary midline closure technique using small bites with slowly absorbable suture reduces incisional hernia rates, and prophylactic mesh augmentation is used in selected high-risk patients. Minimally invasive surgical approaches, where appropriate, reduce hernia risk compared with open laparotomy. For patients, modifiable factors before and after surgery—weight, smoking, glycemic control, nutrition, and avoiding heavy straining during the healing period—all contribute.
Care is typically coordinated by general surgery, with specialized abdominal wall reconstruction, plastic surgery, nutrition, endocrinology, and hepatology input for complex cases. Imaging and clinical findings are interpreted alongside the patient’s symptoms, examination, surgical history, and broader clinical context rather than in isolation.
Patient education plays an important role. Understanding that a ventral hernia will not close on its own, that elective repair is safer than emergency repair, why preoperative weight loss and smoking cessation are required rather than suggested, that recurrence is a real possibility that optimization reduces, what recovery will actually involve for the specific operation planned, and which symptoms mean a hernia has become trapped all contribute to appropriate care and realistic expectations.
Red flag symptoms include a bulge that has become firm, tender, and cannot be pushed back in; severe or rapidly worsening abdominal pain; redness, discoloration, warmth, or skin breakdown over the bulge; nausea and vomiting; abdominal distension with inability to pass gas or stool; fever or drainage from a surgical site; and signs of systemic illness such as rapid heart rate, low blood pressure, or confusion. These warrant immediate emergency evaluation, as they may indicate incarceration, strangulation, bowel obstruction, bowel ischemia, perforation, or mesh infection.