Why Does an Incisional Hernia Develop? Risks After Previous Abdominal Surgery
Author: Op. Dr. Gökhan Ateş · Published: 28 June 2026 · Updated: 28 June 2026
Article summary
An incisional hernia develops when the abdominal wall weakens along a previous surgical incision. Risk is linked to wound healing, intra-abdominal pressure and comorbidities.
An incisional hernia develops when the abdominal wall weakens along the site of a previous operation. It is usually noticed months or years later, sometimes within the first post-operative year.
How it forms
Healing produces a new connective tissue layer. Any factor that impairs the strength of that layer can predispose to incisional hernia.
Risk factors
- Post-operative wound infection
- Chronic cough, constipation and other causes of raised intra-abdominal pressure
- Diabetes, obesity, smoking
- Poor nutrition, long-term steroid use
- Early return to heavy physical activity
- Connective tissue characteristics
Which operations carry higher risk?
Midline laparotomies, emergency operations and contaminated cases carry higher risk. Laparoscopic surgery has lower risk, but hernias can rarely form at port sites.
Evaluation and treatment
Diagnosis is often clinical. Ultrasound or CT clarifies defect size and content in complex hernias. Small, symptom-free hernias may be observed; growing, painful or at-risk hernias are repaired, usually with mesh.
Frequently asked questions
Do incisional hernias recur?
Recurrence risk is higher than for primary hernias; appropriate technique and mesh reduce this.
How soon after surgery can they appear?
Most within 1–2 years, but they may present much later.
Can it be managed without surgery?
Small, symptom-free hernias may be observed. Growing or symptomatic hernias need surgical evaluation.
Related pages
This content is for general patient information only. Diagnosis and treatment decisions should be made by a physician after examination and individual assessment.