Suspected appendicitis needs urgent clinical assessment
Go to an Emergency Department Now If
- Abdominal pain is becoming steadily worse, localising to the lower right side or making movement, coughing or bumps very painful.
- Pain is severe or widespread, the abdomen is rigid or increasingly swollen, or you cannot pass stool or gas.
- There is repeated vomiting, inability to keep fluids down, very little urine, marked weakness or dehydration.
- There is confusion, collapse, pale or blotchy skin, cold sweating, breathing difficulty or rapidly worsening illness.
- Pain briefly improves and then returns as severe generalised abdominal pain; this can occur after perforation.
- A child is unusually still, distressed, drowsy, refusing fluids or unable to walk or hop normally because of pain.
- You are or could be pregnant and have persistent abdominal pain, vaginal bleeding, faintness or shoulder-tip pain.
Do not wait for an outpatient scan, fever or a “perfect” right-sided pain pattern. Appendicitis cannot be safely confirmed or excluded at home.
What Is the Appendix?
The appendix is a narrow, blind-ending pouch attached to the caecum, the first part of the large bowel. Its position varies: it may lie behind the caecum, hang into the pelvis or point in another direction. This normal variation helps explain why appendicitis does not always hurt in exactly the same place.
Inflammation can progress from swelling to impaired blood supply, tissue damage, perforation, local abscess or widespread peritonitis. The speed and pattern vary, so duration alone cannot determine whether an appendix has perforated.
What Causes Appendicitis?
Appendicitis commonly begins when the narrow channel inside the appendix becomes obstructed and bacteria multiply behind the blockage. Swollen lymphoid tissue or hardened bowel material may contribute, but no single cause is identified in many patients.
It is not usually possible to identify one meal, activity or personal mistake that caused the illness, and there is no proven home measure that reliably prevents it.
How Can Appendicitis Feel?
Central pain that moves right
The classic pattern begins near the navel and later localises to the right lower abdomen.
Right-sided pain from the start
Some patients notice lower-right discomfort without an earlier central phase.
Pain with movement
Walking, coughing, taking a deep breath or travelling over bumps may become uncomfortable.
Loss of appetite and nausea
Reduced appetite, nausea or vomiting often accompanies the pain but is not universal.
Fever or bowel change
A temperature, constipation or diarrhoea may occur; absence of fever does not exclude appendicitis.
Urinary or pelvic symptoms
A pelvic appendix can irritate the bladder or rectum and resemble urinary or gynaecological disease.
Who May Have Atypical Symptoms?
What Else Can Resemble Appendicitis?
Right-lower abdominal pain has many possible causes. The differential changes with age, anatomy, pregnancy possibility and associated symptoms.
- Gastroenteritis, inflamed bowel, constipation, swollen abdominal lymph nodes or another bowel condition.
- Urinary infection, kidney or ureteric stone, or another urinary-tract problem.
- Ovarian torsion, ovarian cyst complication, pelvic infection or ectopic pregnancy when relevant.
- Groin hernia, abdominal-wall pain, testicular torsion or referred pain from another site.
- Less commonly, caecal or appendiceal tumour—particularly in an older adult or after an appendicular mass or abscess.
Finding one alternative clue does not automatically exclude appendicitis. Mild urine abnormalities, diarrhoea or a normal early blood result can occur alongside it.
How Is Appendicitis Assessed?
- Check stabilityPulse, blood pressure, temperature, breathing, hydration and signs of sepsis or peritonitis are assessed first.
- Build the timelineThe clinician asks where pain began, whether it moved, what happened before vomiting and how movement affects it.
- Examine the abdomenLocal tenderness, guarding, rebound-type findings, distension, masses and pain with gentle movement are assessed without relying on one sign.
- Look for alternativesUrinary, groin, pelvic, chest or genital assessment may be needed according to the presentation and consent.
- Use laboratory testsBlood, urine and pregnancy testing help estimate risk and identify alternatives or complications.
- Select imagingUltrasound, CT or MRI is chosen according to age, pregnancy status, clinical risk and local expertise.
- Reassess if uncertainObservation and repeat examination can be safer than forcing an early diagnosis from one inconclusive result.
Do Clinical Scores Diagnose Appendicitis?
Scores such as the Alvarado score, Appendicitis Inflammatory Response score and paediatric appendicitis scores combine symptoms, examination and laboratory findings. They can help place a patient into a lower-, intermediate- or higher-risk pathway.
A Score Supports a Pathway—It Does Not Replace a Surgeon
No score should be used by a patient to decide whether to stay home. A low score may reduce unnecessary imaging in an appropriate clinical setting, while pregnancy, age, immune status and evolving symptoms can make a simple score less reliable.
What Do Blood and Urine Tests Show?
Ultrasound, CT or MRI?
What Might an Appendicitis Scan Report Say?
Uncomplicated and Complicated Appendicitis
How Is Appendicitis Treated?
Do not begin a leftover or online-suggested treatment in an attempt to avoid hospital assessment. The distinction between uncomplicated and complicated disease cannot be made safely from symptoms alone.
Can Appendicitis Be Treated Without Surgery?
Non-operative treatment is a legitimate option for selected patients with imaging-confirmed uncomplicated appendicitis, but it is not a universal substitute for appendicectomy. Guidelines differ in emphasis: surgery remains the definitive standard, while a monitored non-operative pathway may suit some informed patients.
- The diagnosis and absence of complications should be assessed by an appropriate surgical team.
- An appendicolith, worsening symptoms, immune compromise, pregnancy, limited follow-up access or concern for another diagnosis may change suitability.
- Initial improvement does not remove the future risk of recurrence or treatment failure.
- Clear instructions are needed for reassessment, emergency return and longer-term follow-up.
- Older adults and patients treated for an appendicular mass or abscess may need evaluation for an underlying appendiceal or bowel tumour.
What Happens During Laparoscopic Appendicectomy?
- PreparationThe team confirms consent, fasting, pregnancy status, allergies, bleeding risk and the anaesthetic plan. Intravenous fluids and preventive infection treatment are given when appropriate.
- General anaesthesiaThe patient is asleep and monitored throughout the operation.
- Keyhole accessSeveral small incisions allow a camera and instruments to enter the abdomen, which is gently expanded with gas.
- Inspect and removeThe appendix is separated safely from its blood supply and bowel attachment, placed in a retrieval bag and removed.
- Control contaminationFluid or pus is removed as needed; the surgeon assesses nearby bowel and the degree of perforation or infection.
- Close and examine the specimenThe incisions are closed, and the appendix is normally sent for laboratory examination.
Occasionally the operation is converted to an open incision, another unexpected cause is found, or more extensive surgery is required. These decisions are based on safety and the findings inside the abdomen.
What Are the Possible Risks of Appendicectomy?
- Bleeding, wound infection, infection inside the abdomen or delayed abscess.
- Injury to bowel, bladder, blood vessels or another nearby structure.
- Anaesthetic, chest, clotting or cardiovascular complications according to individual risk.
- Temporary bowel slowing, later adhesions, bowel obstruction or an incisional hernia.
- Need for drainage, repeat imaging, another procedure or further surgery if infection persists.
- Rare inflammation in a small remaining appendiceal stump.
- An unexpected diagnosis on laboratory examination that requires follow-up.
The risk profile is different for early uncomplicated appendicitis and perforated disease with widespread infection. The surgeon explains the individual balance before consent whenever circumstances permit.
Recovery After Appendicectomy
Warning Signs After Treatment
Seek urgent review for worsening or newly severe abdominal pain, repeated vomiting, increasing distension, inability to pass stool or gas, high fever, shaking chills, faintness, confusion, breathing difficulty, new calf swelling, wound pus or rapidly spreading redness.
After non-operative treatment, recurrent right-lower abdominal pain or a return of the original symptoms should be assessed promptly rather than assumed to be indigestion.
Common Myths About Appendicitis
Frequently Asked Questions
Where does appendicitis pain start?
Classically near the navel before moving to the lower right abdomen, but it may begin or remain elsewhere.
Can appendicitis cause diarrhoea?
Yes, particularly with a pelvic appendix or in children. Diarrhoea does not automatically mean gastroenteritis.
Can I have appendicitis without vomiting or fever?
Yes. Neither symptom is required, especially early or in an atypical presentation.
Can a urine test be abnormal?
Yes. Irritation near the bladder or ureter can produce minor findings, so the result must be interpreted with the full assessment.
Why is a pregnancy test needed?
Pregnancy changes the urgent differential diagnosis and the safest imaging pathway when pregnancy is biologically possible.
Does a normal ultrasound rule out appendicitis?
Only a confidently normal examination interpreted in the full clinical context is reassuring. “Appendix not visualised” is not the same as a normal appendix.
Will I need CT after ultrasound?
Possibly. MRI or CT may follow an inconclusive ultrasound when clinical concern remains; the choice depends on age, pregnancy and local resources.
What is an appendicolith?
A hard deposit inside the appendix. It does not diagnose appendicitis alone, but it can influence complication risk and treatment choice.
What is an appendicular mass?
Nearby bowel and inflamed tissue have clustered around the appendix. The safest initial plan may differ from immediate straightforward surgery.
Is laparoscopic appendicectomy always possible?
It is the usual approach, but severe inflammation, adhesions, anatomy or another finding may require open surgery or conversion.
Can the appendix be normal at surgery?
Yes, although modern assessment and imaging reduce this possibility. The surgeon also looks for another cause of pain.
Can appendicitis return after non-operative treatment?
Yes. Recurrence is an important part of deciding between a non-operative pathway and definitive appendicectomy.
Can appendicitis return after surgery?
Ordinary appendicitis should not recur once the appendix is removed, although rare inflammation of a remaining stump can occur.
How long does recovery take?
Many uncomplicated laparoscopic cases recover substantially within one to two weeks, while perforation, open surgery or abscess can extend recovery. Follow the individual plan.
Why is the appendix sent to the laboratory?
Microscopic examination confirms the diagnosis and occasionally identifies an unexpected condition requiring follow-up.