Hernias
A bulge where tissue pushes through a weak spot in muscle or tissue
Quick Facts
- Type: Structural (muscle or tissue) condition
- Common sites: Groin, belly button, upper stomach, incision sites
- Main treatment: Watchful waiting or surgical repair
- Emergency sign: Painful, firm, non-reducible bulge
Overview
A hernia occurs when an internal organ or fatty tissue pushes through a weakened area in the surrounding muscle or connective tissue. The result is a noticeable bulge, most often in the abdomen or groin, that may come and go with movement, straining, or lying down. Hernias are common and can affect people of all ages, from infants to older adults.
There are several types depending on where they form. Many hernias are not dangerous and cause only mild discomfort, but they do not heal on their own and can slowly enlarge. Occasionally a hernia becomes trapped and its blood supply is cut off, which is a surgical emergency. Understanding the type of hernia and its warning signs helps guide whether to watch it or repair it.
Symptoms
The most common sign is a bulge that you can see or feel:
- A lump in the groin, abdomen, or near a previous surgical scar, often more obvious when standing, coughing, or straining
- Aching, pressure, or discomfort at the site, especially with lifting or activity
- A bulge that may flatten or disappear when lying down or when gently pushed back
- For hiatal hernias near the stomach, heartburn and acid reflux rather than a visible lump
Warning signs of a trapped or strangulated hernia include a bulge that becomes firm, very painful, red or dark, and cannot be pushed back in, often with nausea or vomiting. This needs emergency care.
Causes
Hernias develop from a combination of a weak spot in the muscle wall and pressure that pushes tissue through it. The weakness may be present from birth or develop over time, and contributing pressures include:
- Heavy lifting or sudden straining
- Chronic coughing or sneezing
- Straining during bowel movements or urination
- Pregnancy and obesity, which increase abdominal pressure
- Previous surgery, which can leave a weakened area (incisional hernia)
Different types arise in different places, such as the groin (inguinal), belly button (umbilical), and upper stomach where it meets the diaphragm (hiatal).
Risk Factors
- Older age, with natural weakening of muscle and tissue
- Being male, especially for inguinal hernias
- A personal or family history of hernias
- Obesity and pregnancy
- Chronic cough or constipation
- Jobs or activities involving heavy lifting
- Previous abdominal surgery
Diagnosis
Most hernias are diagnosed by examination:
- Physical exam: A doctor feels for the bulge and may ask you to stand, cough, or strain to make it more apparent.
- Imaging: Ultrasound, CT, or MRI may be used when the diagnosis is unclear or to assess complications.
- Endoscopy or special tests: For hiatal hernias, an upper endoscopy or other tests may be used to evaluate the stomach and esophagus.
Treatment
Treatment depends on the type of hernia, its size, and whether it causes symptoms:
- Watchful waiting: Small, painless hernias may simply be monitored, especially if surgery carries higher risk.
- Surgical repair: The definitive treatment, in which the tissue is returned to place and the weak spot is reinforced, often with a mesh. This may be done as open or minimally invasive (laparoscopic) surgery.
- Lifestyle and medication: For hiatal hernias, weight loss and acid-reducing medicines often control reflux symptoms without surgery.
- Emergency surgery: Required without delay if a hernia becomes trapped or its blood supply is cut off.
Prevention
- Use safe lifting technique and avoid straining with heavy loads
- Maintain a healthy weight
- Eat enough fiber and stay hydrated to avoid constipation and straining
- Treat a chronic cough and avoid smoking
- Strengthen core muscles with appropriate exercise
When to See a Doctor
See a doctor if you notice a new bulge or have discomfort in the groin or abdomen, even if it is mild, so the hernia can be evaluated. Seek emergency care immediately if a hernia bulge:
- Becomes suddenly painful, firm, or tender
- Turns red, purple, or dark
- Cannot be pushed back in
- Is accompanied by nausea, vomiting, fever, or inability to pass gas or stool
These signs may mean the hernia is trapped and needs urgent surgery.
Frequently Asked Questions
Do hernias heal on their own?
No. Hernias do not heal without treatment and tend to gradually enlarge over time. Many small, painless hernias can be safely monitored, but a hernia that grows or causes symptoms usually needs surgical repair.
When is a hernia an emergency?
A hernia is an emergency if the bulge becomes suddenly painful, firm, red or dark, and cannot be pushed back in, especially with nausea or vomiting. This can mean the blood supply is cut off, which requires immediate surgery.
What causes a hernia?
Hernias form when tissue pushes through a weak spot in the muscle wall. The weakness may be present from birth or develop with age, and pressure from heavy lifting, straining, chronic cough, pregnancy, or obesity can drive tissue through it.
Is hernia surgery always needed?
Not always. Small, symptom-free hernias may be watched, and hiatal hernias are often managed with lifestyle changes and medication. Surgery is recommended for hernias that cause pain, grow, or risk becoming trapped.
Can I prevent a hernia?
You can lower your risk by lifting safely, maintaining a healthy weight, avoiding constipation and straining, treating a chronic cough, and not smoking. Some hernias, especially those present from birth, cannot be prevented.
References
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Inguinal Hernia.
- American College of Surgeons. Hernia repair.
- Mayo Clinic. Hernia.
- MedlinePlus, U.S. National Library of Medicine. Hernia.