Incisional Hernia

An incisional hernia is a bulge of tissue that develops through a weakened area in the abdominal wall at the site of a previous surgical incision. It can appear weeks, months or years after surgery and is usually evaluated by a general surgeon.

Overview

An incisional hernia is a type of abdominal wall hernia that occurs at the site of a previous surgical cut. After abdominal surgery, the muscles and connective tissues heal together to restore strength. If this healed area becomes weak or separates, internal fat or bowel can push outward and create a visible or feelable bulge.

Incisional hernias can develop after open surgery or after larger laparoscopic or robotic port sites, although the risk is generally higher after larger incisions. They may appear soon after surgery or many years later. Some remain small and cause only mild discomfort, while others gradually enlarge and interfere with daily activities.

The condition is not the same as a normal scar. A scar is a surface change in the skin, while an incisional hernia involves deeper weakness in the abdominal wall. Because the hernia may contain bowel or other internal tissue, assessment by a qualified doctor is important, especially if symptoms change.

Symptoms

The main symptom of an incisional hernia is a bulge, swelling or lump near a previous abdominal surgical scar. The bulge may become more obvious when standing, coughing, laughing, lifting or straining, and it may reduce or flatten when lying down. Some people can gently push the bulge back in, while others cannot.

Discomfort is common, particularly after physical activity or at the end of the day. The sensation may be described as pulling, pressure, heaviness, aching or a burning feeling around the scar. Skin over the hernia is often normal, but repeated stretching may cause thinning or irritation.

Possible symptoms include:

• A visible or palpable bulge at or near a surgical scar
• Pain, pressure or tenderness around the incision site
• A feeling of weakness in the abdominal wall
• Symptoms that worsen with coughing, lifting or straining
• Nausea, bloating or bowel changes in some cases

Sudden severe pain, persistent vomiting, a firm bulge that cannot be pushed back, redness or dark discoloration over the hernia may suggest a trapped or strangulated hernia. These symptoms require urgent medical evaluation.

Causes & Risk Factors

An incisional hernia develops when the healing strength of a surgical wound is not enough to withstand pressure from inside the abdomen. Normal activities such as coughing, bending, bowel movements or lifting create abdominal pressure. If the deeper layers of the incision have weakened, this pressure can gradually widen the defect.

Some factors increase the chance of poor wound healing or extra pressure on the abdominal wall. These include wound infection after surgery, obesity, smoking, diabetes, poor nutrition, chronic cough, constipation, repeated heavy lifting, steroid use and certain connective tissue conditions. Emergency surgery and repeat operations through the same area can also increase risk.

Risk may also depend on the location and type of the original incision, the surgical technique used, and how the wound healed in the weeks after surgery. Following post-operative instructions, avoiding smoking, managing chronic disease and returning to activity gradually may help reduce risk, but an incisional hernia can still occur even when recovery was careful.

Diagnosis

Diagnosis usually begins with a medical history and physical examination. The doctor asks about previous operations, when the bulge appeared, whether it changes with position or activity, and whether there is pain, nausea, vomiting or bowel difficulty. The examination is often performed while the patient is standing and lying down, because some hernias are easier to feel in certain positions.

In many cases, a surgeon can diagnose an incisional hernia by examination alone. Imaging may be recommended if the hernia is small, the anatomy is complex, the patient has had several operations, or surgery is being planned. Ultrasound can show a defect in the abdominal wall and movement of tissue through it. CT or MRI scans can provide more detailed information about the hernia size, contents and surrounding muscles.

Diagnosis also includes assessing general health and surgical risk. This may involve blood tests, review of medications, evaluation of heart and lung conditions, and optimization of factors such as blood sugar control, weight, nutrition and smoking status. A complete assessment helps the specialist decide whether monitoring or repair is the safer and more appropriate approach.

Treatment Options

Treatment for an incisional hernia depends on the size of the defect, symptoms, rate of growth, risk of complications and the patient’s overall health. The right approach should be decided by a general surgeon or hernia specialist after assessment. Not every incisional hernia needs immediate surgery, but symptomatic, enlarging or complex hernias are commonly considered for repair.

Non-surgical management may be suitable for selected people with small hernias that cause minimal symptoms or for patients whose surgical risk is temporarily high. This may include observation, lifestyle measures, treatment of constipation or chronic cough, weight management, smoking cessation and avoidance of heavy straining. An abdominal binder may provide short-term support for comfort, but it does not close the hernia defect.

Surgical repair aims to return tissue to its proper position and strengthen the abdominal wall. Techniques may include open repair, laparoscopic repair or robotic-assisted repair, depending on the hernia features and the surgeon’s assessment. Mesh reinforcement is often used in incisional hernia repair to reduce tension and support the weakened area, but the choice of mesh type and position is individualized.

Some patients require more advanced abdominal wall reconstruction, especially if the hernia is large, recurrent or associated with loss of abdominal wall function. Recovery time varies according to the procedure, hernia size and personal health factors. Patients are usually given instructions about wound care, walking, pain control and when to resume lifting, exercise and work.

Living With / Prognosis

Many people live with an incisional hernia for some time before repair, particularly if it is small and not causing significant symptoms. During this period, it is important to monitor the hernia for changes in size, pain or reducibility. Gentle activity is usually encouraged, but heavy lifting or straining may worsen discomfort and should be discussed with a doctor.

After hernia repair, most patients gradually return to normal daily activities. Long-term results depend on the hernia size, tissue quality, presence of risk factors, surgical method and adherence to recovery advice. Recurrence can happen, so follow-up appointments and healthy wound-healing habits are important.

Helpful measures may include maintaining a healthy weight, treating chronic cough, preventing constipation, stopping smoking, managing diabetes and building core strength only when cleared by the surgeon. International patients may seek coordinated evaluation and treatment at centers such as Acibadem International, where multidisciplinary specialists in JCI-accredited hospitals manage abdominal wall hernias based on individual assessment.

When to See a Doctor

A doctor should evaluate any new bulge near a previous abdominal incision, even if it is painless. Early assessment helps confirm the diagnosis, estimate the size and discuss safe monitoring or treatment options. This is especially important if the bulge is increasing, causing discomfort or limiting activity.

Medical review is also recommended before starting strenuous exercise, heavy lifting or a new work routine that may increase abdominal pressure. People with risk factors such as obesity, diabetes, smoking, chronic cough or a history of wound infection may benefit from earlier specialist input because these factors can affect treatment planning.

Urgent medical care is needed if the hernia becomes suddenly painful, firm, red, dark or impossible to push back, or if it is associated with vomiting, fever, abdominal swelling or inability to pass stool or gas. These symptoms can indicate incarceration or strangulation, which requires prompt evaluation and may need emergency treatment.

Frequently asked questions

What is an incisional hernia?

An incisional hernia is a bulge that forms through a weakened area of the abdominal wall where surgery was previously performed. It may contain fat, tissue or part of the bowel. It is usually assessed by a general surgeon.

What does an incisional hernia feel like?

It often feels like a soft or firm bulge near a surgical scar. The bulge may appear when standing, coughing or straining and may flatten when lying down. Some people feel pressure, pulling, aching or burning around the area.

Can an incisional hernia heal without surgery?

An incisional hernia does not usually close on its own because the weakness is in the deeper abdominal wall. Small, low-symptom hernias may be monitored in selected patients. A specialist can advise whether observation or repair is the safest option.

When is incisional hernia surgery needed?

Surgery may be recommended if the hernia is painful, enlarging, difficult to reduce, affecting daily life or at risk of complications. The decision also depends on the patient’s overall health and surgical risk. The exact repair method is chosen after specialist assessment.

Is mesh always used for incisional hernia repair?

Mesh is commonly used because it can reinforce the weakened abdominal wall and reduce tension on the repair. However, not every case is the same. The surgeon considers the hernia size, location, tissue condition, infection risk and previous operations before choosing the best technique.

What symptoms suggest an emergency?

Emergency symptoms include sudden severe pain, a hard bulge that cannot be pushed back, redness or dark skin over the hernia, persistent vomiting, fever, abdominal swelling or inability to pass stool or gas. These signs can suggest trapped or compromised tissue. Prompt medical care is necessary.

How can recurrence risk be reduced after repair?

Patients can support healing by following lifting restrictions, attending follow-up visits, avoiding smoking, managing weight, controlling diabetes and treating chronic cough or constipation. Recovery should be gradual and guided by the surgeon. Even with good care, recurrence can occur, so ongoing awareness is important.

References

• European Hernia Society
• American College of Surgeons
• Society of American Gastrointestinal and Endoscopic Surgeons
• National Institute for Health and Care Excellence
• Mayo Clinic

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.