Hernia Complications and Strangulation
Most hernias start simple, but neglect can lead to incarceration or strangulation of the bowel — life-threatening emergencies. Every operation also has possible complications, which a specialist surgeon can greatly reduce.
Contents
Complications of an untreated hernia
1. Enlargement
An adult hernia grows over time: more symptoms, a more difficult repair, possible loss of domain in giant hernias and skin damage.
2. Incarceration
Contents become trapped and will not return to the abdomen: an irreducible bulge, more pain, sometimes obstructive symptoms. Urgent surgical assessment is needed; a doctor may attempt gentle reduction if there are no signs of strangulation, followed by early surgery. Some long-standing fat-filled hernias are chronically incarcerated without immediate danger but still need repair.
3. Strangulation — emergency
The blood supply to trapped contents is cut off and tissue begins to die within hours. Emergency surgery is required, sometimes with bowel resection. Risk is highest in femoral hernias, narrow-necked and recent hernias, and inguinal hernias in infants.
4. Bowel obstruction
Trapped bowel blocks the passage of food and gas, causing distension, vomiting and colic.
Emergency signs — go to hospital immediately: sudden severe pain at the hernia • a hard tender bulge that will not go back • red, purple or dark skin • nausea and vomiting • abdominal distension • no gas or stool • fever and rapid pulse. Do not force the hernia back and do not eat or drink until seen.
Complications of hernia surgery
| Complication | What it is | Frequency / management |
|---|---|---|
| Seroma | Fluid collection at the old hernia site | Common, especially after laparoscopy; usually resolves in weeks |
| Bruising / swelling | Minor bleeding, scrotal swelling | Temporary |
| Wound infection | Redness, discharge, fever | Uncommon; antibiotics and wound care |
| Mesh infection | Deep infection around the mesh | Rare; may need surgery |
| Urinary retention | Difficulty passing urine | Temporary, more in elderly and prostate patients |
| Chronic pain | Pain >3 months | ~10% after inguinal repair, troublesome in a few; reduced by careful technique |
| Recurrence | Hernia returns | Varies by type; reduced by mesh, specialist surgery and risk-factor control |
| Organ injury | Bowel, bladder or vessel injury | Very rare |
| Testicular problems | Swelling or atrophy | Very rare |
| Adhesions | Bowel sticking to mesh | Rare with modern meshes placed outside the abdomen |
Chronic pain after hernia surgery
Caused by irritation or injury of the groin nerves (ilioinguinal, iliohypogastric, genital branch), or by the mesh or fixation. Risk factors include severe pre-operative pain, young age, open surgery and post-operative complications. Treatment: analgesics and neuropathic agents, local injections, physiotherapy, and in selected cases mesh removal or neurectomy in specialist centres.
Why does a hernia recur?
Patient factors: obesity, smoking, chronic cough, constipation, diabetes, wound infection. Technical factors: a mesh too small, inadequate fixation, a missed defect. The solution: a specialist who chooses the right approach (e.g. laparoscopic after previous open repair) and optimisation of risk factors. See hernia surgery and hernia mesh.
How to reduce complications
- Don't neglect a hernia — planned repair is much safer than emergency surgery.
- Choose a hernia and abdominal wall specialist.
- Stop smoking and optimise weight and diabetes.
- Treat cough, constipation and prostate problems.
- Follow post-operative advice: recovery guide.
Frequently asked questions
How do I know if my hernia is strangulated?
How long can a strangulated hernia wait?
Is pain after hernia surgery normal?
Scientific references
- HerniaSurge Group. International guidelines for groin hernia management. Hernia 2018
- Birindelli A et al. 2017 update of the WSES guidelines for emergency repair of complicated abdominal wall hernias. World J Emerg Surg 2017
- Alfieri S et al. International guidelines for chronic pain following inguinal hernia surgery. Hernia 2011
⚠ This website is for health education and does not replace a medical examination. If you develop sudden severe pain at a hernia, vomiting, or the bulge changes colour, go to the emergency department immediately.