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Published on August 16, 2026 at 9:19 AM
π©Ί Medically reviewed by the Health Decoded Guide Editorial Team · Last reviewed: August 2026
π Quick Summary
Appendicitis is inflammation of the appendix, a small pouch attached to the beginning of the large intestine.
The pain often starts around the middle of the abdomen and later moves to the lower right side.
Appendicitis needs prompt medical assessment because an untreated appendix can rupture and cause a serious infection.
π Not everyone develops the classic pattern of symptoms, so persistent or worsening abdominal pain should be taken seriously.
1οΈβ£ Introduction
The appendix is a small, narrow pouch connected to the large intestine, usually located in the lower right side of the abdomen.
Appendicitis happens when the appendix becomes inflamed and infected.
• it can affect children and adults
• abdominal pain is usually the main symptom
• treatment is often needed urgently
Appendicitis is one of the important causes doctors consider when someone develops new, worsening abdominal pain.
2οΈβ£ How it happens
Appendicitis often develops when the opening of the appendix becomes blocked.
This can lead to:
• swelling inside the appendix
• increasing pressure
• bacterial growth
• reduced blood supply to the appendix
Without treatment, the inflamed appendix can eventually develop a hole or rupture.
π A ruptured appendix can allow infection to spread inside the abdomen.
3οΈβ£ Types
Uncomplicated appendicitis
• the appendix is inflamed
• there is no evidence of rupture, abscess or widespread infection
Complicated appendicitis
• the appendix may rupture
• an abscess may develop
• infection may spread through the abdominal cavity
The earlier appendicitis is identified, the better the chance of treating it before complications develop.
4οΈβ£ Common causes
The exact reason for the blockage is not always identified.
Possible causes include:
Blockage inside the appendix
• hardened stool
• swelling of lymphatic tissue after an infection
Less common causes
• certain intestinal infections
• foreign material
• rarely, a tumour
π Appendicitis is not usually caused by something you ate or did wrong.
5οΈβ£ Symptoms
A common pattern is:
• pain beginning around the belly button
• pain moving towards the lower right abdomen
• pain becoming progressively worse
• reduced appetite
• nausea or vomiting
• fever
• pain that worsens with movement, coughing or bumps during travel
The pain pattern can vary, especially in young children, older adults and during pregnancy.
6οΈβ£ Associated symptoms or complications
Some people may also experience:
• abdominal swelling
• constipation or diarrhea
• difficulty passing gas
• general weakness or feeling unwell
• urinary symptoms if the inflamed appendix irritates nearby structures
If the appendix ruptures, complications can include:
• abscess
• peritonitis
• sepsis
A sudden change in severe abdominal pain does not necessarily mean the problem has resolved.
7οΈβ£ π©Ί When it becomes dangerous π¨
Seek urgent medical care for:
• severe or rapidly worsening abdominal pain
• pain moving towards the lower right abdomen
• severe abdominal pain with fever or persistent vomiting
• a very tender, rigid or swollen abdomen
• confusion, fainting or severe weakness
• severe pain that suddenly changes after becoming progressively worse
π These may indicate:
• ruptured appendix, peritonitis or another serious abdominal condition
• need for urgent medical assessment
8οΈβ£ Management / treatment
Treatment depends on whether the appendicitis is uncomplicated or complicated.
It may include:
• antibiotics
• fluids and pain relief
• surgical removal of the appendix (appendicectomy/appendectomy)
• drainage of an abscess when necessary
Some carefully selected uncomplicated cases may be treated initially with antibiotics rather than immediate surgery, although recurrence can occur.
Appendicitis should be assessed in hospital so the appropriate treatment can be decided safely.
9οΈβ£ Diagnosis
There is no single symptom that confirms appendicitis.
Assessment may include:
• medical history and abdominal examination
• blood tests
• urine test
• pregnancy test when relevant
• ultrasound or CT scan
• observation and repeat examination when the diagnosis remains uncertain
Appendicitis can resemble several other conditions, so doctors often combine the symptoms, examination and test results before making the diagnosis.
π’ Important Message
Appendicitis is treatable, and most people recover well when it is recognised and managed promptly.
If abdominal pain is becoming progressively worse—particularly if it moves towards the lower right side—seek medical assessment rather than waiting for it to become severe.
FAQ
• Where does appendicitis pain usually start?
It commonly starts around the belly button and later moves to the lower right abdomen, although this pattern does not occur in everyone.
• Can appendicitis go away on its own?
Symptoms can sometimes fluctuate, but suspected appendicitis should not be managed by simply waiting for it to disappear. Medical assessment is important.
• Does everyone with appendicitis need surgery?
No. Surgery remains a common treatment, but selected uncomplicated cases may sometimes be treated with antibiotics. The appropriate option depends on the individual situation.
• Can you live normally without an appendix?
Yes. People can live normally after the appendix is removed.
π§ Why We Delay
Appendicitis can begin with vague discomfort that feels like indigestion, trapped gas or an ordinary stomach upset. Some people therefore wait for the pain to settle or repeatedly take painkillers while the inflammation continues.
The symptoms are not always textbook, but pain that is persistent, worsening or accompanied by fever and vomiting deserves medical assessment.
π You do not need to be certain it is appendicitis before seeking help—worsening abdominal pain is enough reason to get checked.
π Related Health Topics
• Abdominal Pain
• Pelvic Pain
• Gastroenteritis
• Constipation
• Ectopic Pregnancy
π Medical References
• National Health Service (NHS) Appendicitis.
• National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) Symptoms and Causes of Appendicitis.
• Mayo Clinic Appendicitis.
• Cleveland Clinic Appendicitis.
• Johns Hopkins Medicine Appendicitis.
β οΈ Medical Disclaimer
This article is for educational purposes only and does not replace professional medical advice.
If you have severe or worsening abdominal pain, persistent vomiting, fever or other concerning symptoms, seek medical assessment.