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Hernia: Types, Symptoms, Causes, Surgery & Recovery

  • Prof. Dr. Zahid Mahmood
  • August 7, 2026

Hernia: Types, Symptoms, Causes, Surgery & Recovery

Medically reviewed by Prof. Dr. Zahid Mahmood, MBBS, FCPS — General, Laparoscopic & Laser Surgeon, Lahore.

A hernia occurs when fat, bowel or another internal structure pushes through a weak area in the surrounding muscle or connective tissue. It often appears as a lump in the groin or abdominal wall that becomes more noticeable on standing, coughing or straining.

Many hernias develop gradually and are not immediately dangerous. However, a painful hernia that becomes trapped or loses its blood supply is a surgical emergency. This guide explains common types, symptoms, diagnosis, treatment options and warning signs.

What causes a hernia?

A hernia usually develops through an area of natural weakness or a previous surgical incision. Increased pressure inside the abdomen may make a weakness more apparent.

Associated factors include:

  • Increasing age and weakening of connective tissue
  • Family tendency or a naturally weak abdominal wall
  • Heavy lifting or repeated straining
  • Chronic cough
  • Constipation and straining during bowel movements
  • Difficulty passing urine due to an enlarged prostate
  • Pregnancy
  • Overweight or obesity
  • Smoking
  • Previous abdominal surgery or wound infection

A hernia is not necessarily caused by one episode of lifting. Lifting may reveal an existing weakness, while age, anatomy and tissue quality also play important roles.

Common types of abdominal wall hernia

Inguinal hernia

An inguinal hernia appears in the groin and is the commonest type, particularly in men. It may extend into the scrotum. The swelling often becomes larger on coughing or standing and smaller when lying down.

Femoral hernia

A femoral hernia appears in the upper thigh just below the groin crease. It is less common but has a relatively higher risk of trapping bowel, so early surgical assessment is important.

Umbilical and paraumbilical hernia

These occur at or next to the belly button. They are common in infants, but adult umbilical hernias are associated with obesity, pregnancy, abdominal fluid or weakness of the abdominal wall.

Epigastric hernia

An epigastric hernia forms in the midline between the breastbone and the belly button. It may contain fatty tissue and can be painful even when the lump is small.

Incisional hernia

An incisional hernia develops through the scar of a previous abdominal operation. It may appear months or years later and can gradually enlarge.

Recurrent hernia

A recurrent hernia returns at the site of an earlier repair. Treatment planning depends on the previous operation, the type of mesh used, symptoms and current anatomy.

What are the symptoms?

  • A lump in the groin, upper thigh, belly button or abdominal scar
  • A swelling that increases on coughing, straining or standing
  • A dragging, aching, burning or heavy sensation
  • Discomfort during lifting, walking or exercise
  • A lump that becomes smaller or disappears when lying down
  • Groin swelling extending into the scrotum

Some hernias cause little pain despite being large. Conversely, a small hernia may be painful. Not every groin or abdominal lump is a hernia, so examination is important.

Reducible, irreducible, obstructed and strangulated hernia

  • Reducible: the contents return into the abdomen spontaneously or with gentle pressure.
  • Irreducible: the lump can no longer be returned. This requires prompt medical assessment.
  • Obstructed: trapped bowel causes intestinal blockage, with pain, vomiting, swelling and inability to pass stool or gas.
  • Strangulated: the blood supply to trapped tissue is cut off. The bowel can become damaged or perforate; emergency surgery is required.

Emergency warning signs

Go to an emergency department immediately if a hernia:

  • Suddenly becomes very painful or increasingly tender
  • Becomes firm, tense or cannot be pushed back
  • Is associated with nausea or repeated vomiting
  • Occurs with abdominal swelling or inability to pass stool or gas
  • Develops red, purple or dark skin over the lump
  • Occurs with fever, weakness, confusion or feeling seriously unwell

Do not repeatedly force a painful lump back and do not delay care while trying home remedies.

How is a hernia diagnosed?

Most abdominal wall hernias are diagnosed by history and physical examination. The surgeon may examine the area while you are standing and ask you to cough or strain.

An ultrasound may help when the lump is small or uncertain. CT or MRI can be useful for complex, recurrent or incisional hernias, unexplained pain or emergency complications.

Does every hernia need surgery?

A hernia does not heal permanently by itself. Whether and when to operate depends on its type, symptoms and individual risk.

Watchful waiting may be reasonable for some men with a minimally symptomatic inguinal hernia after surgical assessment and discussion of risks. Painful, enlarging or activity-limiting hernias are usually repaired. Femoral hernias are generally treated earlier because of their complication risk. An obstructed or strangulated hernia requires emergency surgery.

A truss or belt may provide temporary support for selected patients but does not close the defect. It should only be used after professional advice and should never delay assessment of a painful or irreducible hernia.

Open and laparoscopic hernia repair

In open repair, the surgeon makes an incision over the hernia, returns the contents and repairs the weakness. In laparoscopic repair, a camera and instruments are introduced through small abdominal cuts to repair the defect from inside.

Laparoscopic techniques commonly used for groin hernias include TEP and TAPP. They may be particularly useful for hernias on both sides or after some previous open repairs. Open surgery remains an excellent option for many patients.

The best approach depends on the hernia type, whether it is one-sided or bilateral, previous operations, anaesthetic suitability and the surgeon’s expertise.

Why is mesh used?

Mesh reinforces the weak area and reduces tension on the patient’s tissues. Mesh-based repair is standard for most adult groin and many abdominal wall hernias because it lowers recurrence compared with simply stitching weak tissue together.

Mesh infection is uncommon but important. In selected circumstances, including some contaminated emergency operations or particular small defects, a non-mesh repair may be considered.

Possible complications of hernia surgery

  • Bruising, swelling, seroma or haematoma
  • Wound or mesh infection
  • Temporary difficulty passing urine
  • Numbness or persistent pain
  • Injury to bowel, bladder, blood vessels, nerves or structures of the spermatic cord
  • Blood clots or anaesthetic complications
  • Hernia recurrence

Your surgeon should explain benefits, alternatives and risks relevant to your particular hernia and health.

Recovery after repair

Most patients are encouraged to walk soon after surgery. Pain and bruising improve gradually. Many return to light or desk-based work within one to two weeks, while strenuous work may require longer.

Take pain medicines as prescribed, care for the wound and build activity gradually. Avoid activities that cause significant pain and follow the lifting advice given by your surgeon. Treat constipation, stay hydrated and avoid smoking to support healing.

Can a hernia be prevented?

Not every hernia can be prevented, but you can reduce avoidable strain by:

  • Maintaining a healthy weight
  • Stopping smoking
  • Treating a persistent cough
  • Eating enough fibre and treating constipation
  • Using correct lifting technique
  • Managing urinary obstruction
  • Following postoperative wound and activity advice

Common questions

Can exercise cure a hernia?

No. Exercise can improve general strength but cannot close a true hernia defect. Some exercises may make the bulge or discomfort more noticeable.

Can medicine dissolve a hernia?

No medicine closes an abdominal wall defect. Medicines may treat associated constipation, cough or pain but do not repair the hernia.

Can I continue working with a hernia?

Many people can continue light activity while awaiting assessment. Reduce or stop an activity if it causes pain or enlarges the swelling, and seek individual advice for heavy work.

Will a hernia always become strangulated?

No, but the risk is not identical for every hernia. Femoral hernias and painful irreducible hernias require particular attention. Learn the emergency warning signs even if observation has been advised.

Key message

A hernia commonly causes a lump that enlarges with coughing or standing. Surgery is the only permanent repair, although immediate operation is not necessary for every minimally symptomatic inguinal hernia. Sudden pain, an irreducible lump, vomiting or abdominal swelling may indicate obstruction or strangulation and requires emergency care.

Consult a hernia surgeon in Lahore

Prof. Dr. Zahid Mahmood can assess groin, umbilical, incisional and recurrent hernias and discuss open or laparoscopic repair according to the individual patient.

For an appointment, call 0300 413 0159 or visit professorzahid.com.

This article is for general education and does not replace personal medical assessment. A painful irreducible hernia, vomiting, abdominal swelling or signs of serious illness require urgent medical care.

Medical references

  1. Williams NS, O’Connell PR, McCaskie AW, editors. Bailey & Love’s Short Practice of Surgery. 28th ed. CRC Press; 2023. Chapter 64, “The abdominal wall, hernia and umbilicus,” pp. 1059–1082.
  2. NHS. Hernia: symptoms, urgent warning signs and treatment.
  3. HerniaSurge Collaboration. Update of the international guidelines for groin hernia management. 2023.
  4. NHS. Inguinal hernia repair.

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