Inguinal hernia
An inguinal hernia occurs when fat or part of the intestine bulges through a weak area in the lower abdominal wall near the groin. Some hernias cause little trouble, but a painful or trapped hernia can become an emergency if its blood supply is cut off.
At a glance
Quick facts
- Category
- Abdominal wall hernia
- Typical site
- Groin / inguinal canal
- Common sign
- Visible or palpable bulge
- Often worse with
- Coughing, lifting or standing
- Emergency complication
- Strangulation
- Definitive treatment
- Surgical repair when indicated
Dr. Francis Chibueze Nwokpoku
Medical Officer · 9th Division Hospital, Nigerian Army
Reviewed for clinical accuracy, important omissions and patient-facing safety wording.
Names & terminology
How this entity may be named or searched
- Inguinal hernia
- A hernia passing through the inguinal region of the lower abdominal wall.
- Indirect inguinal hernia
- A hernia related to a congenital opening or pathway through the inguinal canal.
- Direct inguinal hernia
- A hernia through an acquired weak area of the inguinal canal wall, usually in adults.
- Incarcerated / strangulated
- Incarcerated means trapped; strangulated means blood flow is compromised and tissue is at risk.
Structured entity profile
Clinical profile
Overview
An inguinal hernia forms when abdominal tissue pushes through a weak area in the lower abdominal wall. The hernia may contain fat or intestine and can move in and out of the abdominal wall. [1]
Inguinal hernias are substantially more common in males. NIDDK cites lifetime estimates of about 27% of men and 3% of women. The likelihood increases with age in adults. [1]
Symptoms and warning signs
A groin bulge is common. People may also notice heaviness, burning, pressure or pain, especially with lifting, coughing, straining or prolonged standing. Symptoms may improve when lying down. [1]
SYMPTOM MATRIX
Most hernias are reducible, but a trapped hernia can become urgent
Sudden pain, a non-reducible bulge or bowel-obstruction symptoms need prompt medical assessment.
- Groin bulge
- Heaviness or pressure
- Aching or burning discomfort
- Symptoms worse with coughing or lifting
- Improvement when lying down
- Scrotal swelling in males
- Minimal or no pain
- Bulge only with standing or straining
- Symptoms on one or both sides
- Suddenly larger or very painful bulge
- Bulge no longer goes back in
- Redness or marked tenderness
- Vomiting, bloating or inability to pass stool/gas
- Fever
A strangulated hernia is life-threatening because blood supply to trapped tissue can be lost.
Diagnosis
Diagnosis is usually based on history and physical examination. A clinician may examine the groin while the patient stands and may ask them to cough or strain to make a hernia easier to detect. [1]
If the examination is inconclusive, ultrasound, CT or MRI can be used to look for a hernia or a complication. Imaging is especially useful when symptoms are present but a clear bulge is not seen. [1]
Diagnostic pathway
Clinical examination comes first
Imaging supports the diagnosis when the physical findings are uncertain or complications are suspected.
A suddenly painful, non-reducible hernia with obstruction or systemic symptoms is an urgent surgical problem rather than a routine imaging question. Source [1]
Incarceration and strangulation
An incarcerated hernia is trapped outside the abdominal wall. If blood flow is cut off, the hernia is strangulated; bowel obstruction, tissue death and perforation can follow. Sudden severe pain, redness, vomiting or a bulge that no longer reduces warrants immediate medical care. [1]
Treatment and management
Most symptomatic inguinal hernias are treated with surgical repair. Open and laparoscopic approaches are both used, and mesh is commonly used to reinforce the weak area. The choice of operation depends on the hernia, patient factors and surgeon expertise. [1]
Mesh reinforcement is commonly used in adult inguinal-hernia repair because it can reduce recurrence in appropriate patients.
In some men with minimally symptomatic hernias, watchful waiting may be considered after clinical discussion, but worsening pain or increasing difficulty reducing the hernia should prompt reassessment. Emergency surgery is required for strangulation. [1]
Treatment & care hub
Match treatment to symptoms and complication risk
A reducible minimally symptomatic hernia is different from a painful trapped hernia.
Watchful waiting when appropriate
Some minimally symptomatic inguinal hernias can be monitored with clear return precautions.
Repair symptomatic hernias
Open or minimally invasive repair closes the defect and commonly reinforces it with mesh.
Treat strangulation or obstruction
A trapped hernia with compromised bowel or blood supply requires urgent surgical care.
Gradual return to activity
Postoperative restrictions and return to lifting vary by procedure and individual recovery.
After hernia repair
Recovery depends on the surgical approach, hernia size and the patient’s health. Persistent fever, worsening wound redness, inability to pass urine, severe pain or recurrent swelling should be reviewed after surgery. [1]
Lifetime risk estimate
Inguinal hernias are much more common in men
NIDDK summarizes lifetime estimates from epidemiologic studies.
Common questions
Frequently asked questions
No. The abdominal-wall defect does not usually close on its own, although symptoms may remain stable for a period of time.
Severe pain, a non-reducible bulge, redness, vomiting, abdominal distension or fever can indicate incarceration or strangulation and require urgent assessment.
Most are diagnosed by history and physical examination. Imaging is used when the diagnosis is uncertain or complications are suspected.
Not always. Some minimally symptomatic hernias can be monitored, but symptomatic, enlarging or complicated hernias commonly need repair.
Yes. Recurrence can occur, although modern repair techniques reduce the risk.
Sources
- NIDDK, NIH — Inguinal Hernia
This article is based on trusted medical sources and has undergone clinician review. It is not a substitute for personalized medical advice.
A hernia that becomes painful and no longer reduces is a red flag. Severe pain, vomiting or skin changes over the bulge can indicate incarceration or strangulation and require urgent surgical assessment.