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DigestiveICD-10: K35.80Lifetime risk of approximately 7-8%

Appendicitis

Also known as: Inflamed Appendix

Appendicitis is an inflammation of the appendix, a small finger-shaped pouch attached to the large intestine in the lower right abdomen. It is a medical emergency that typically requires surgical removal of the appendix (appendectomy) to prevent rupture. A ruptured appendix can lead to peritonitis, a life-threatening infection of the abdominal cavity.

Symptoms

Sudden pain beginning around the navel and shifting to the lower right abdomen
Pain that worsens with movement, coughing, or deep breathing
Nausea and vomiting
Loss of appetite
Low-grade fever that may worsen as illness progresses
Abdominal bloating
Inability to pass gas

Causes

  • Blockage of the appendix lumen by stool, mucus, or foreign body
  • Enlarged lymphoid follicles (often due to infection)
  • Parasitic infections
  • Abdominal trauma

Risk Factors

  • Age between 10 and 30 years (most common age group)
  • Male sex (slightly higher incidence)
  • Family history of appendicitis
  • Low-fiber diet

Diagnosis

  • Physical examination (McBurney's point tenderness, rebound tenderness)
  • Complete blood count showing elevated white blood cells
  • CT scan of the abdomen and pelvis
  • Ultrasound (preferred in children and pregnant women)

Treatment

  • Appendectomy (laparoscopic or open surgery)
  • Intravenous antibiotics before and after surgery
  • Antibiotics alone may be used in select uncomplicated cases
  • Abscess drainage if the appendix has ruptured with contained infection

When to See a Doctor

  • You experience sudden, severe abdominal pain in the lower right side
  • Abdominal pain is accompanied by fever, nausea, and vomiting
  • Pain worsens rapidly over hours—seek emergency care immediately
  • You have rebound tenderness when pressing on the abdomen

Frequently Asked Questions

Related Conditions

Diverticulitis

Digestive

Crohn's Disease

Autoimmune

Colorectal Cancer

Cancer

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Medical Disclaimer: This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider.

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