Appendicitis is the most common surgical emergency in the world. The appendix is a small pouch attached to the large intestine in the right lower abdomen. It has no established physiological function but when its lumen becomes obstructed and infected, the consequences are rapid. Inflammation progresses from mucosal oedema to transmural necrosis and, without surgical intervention, perforation typically occurs within 24 to 72 hours of symptom onset. If left untreated perforated appendicitis can become a life threatening condition. The window for simple surgical management is narrow, and it closes faster than most patients expect.

Common Causes of Appendicitis

The primary trigger is obstruction of the appendiceal lumen, leading to bacterial overgrowth, distension, ischaemia and infection. Obstruction can occur due to:

• Faecaliths (hardened stool deposits) is the most common cause in adults
• Lymphoid hyperplasia is dominant cause in children and adolescents, often following viral infection
• Mucous plugs or inspissated secretions
• Intestinal parasites like Enterobius vermicularis (pinworm) in endemic regions
• Appendiceal or caecal tumours.

Warning Signs and Symptoms of Appendicitis

The classic presentation follows a recognisable sequence, although atypical presentations are common in children, pregnant women, and older adults:

• Central abdominal pain migrating to the right iliac fossa. Pain typically begins periumbilically or diffusely, then localises to McBurney's point (one-third of the distance from the right anterior superior iliac spine to the umbilicus) over 12 to 24 hours. This migration pattern is highly specific for appendicitis.
• Anorexia or loss of appetite almost universally precedes or accompanies appendiceal pain. A hungry patient rarely has appendicitis.
• Nausea and vomiting usually follow the pain rather than preceding it - helping distinguish appendicitis from gastroenteritis, where vomiting often comes first.
• Low-grade fever (temperature typically 37.5–38.5°C) in uncomplicated appendicitis. A temperature above 39°C suggests perforation or abscess formation.
• Palpation of the right iliac fossa elicits pain; sudden release of pressure worsens it (rebound tenderness). Voluntary or involuntary guarding of the abdominal wall muscles indicates peritoneal irritation.
• Rovsing's sign. - palpation of the left iliac fossa causing pain in the right (a clinical sign of right-sided peritoneal irritation).
• Atypical presentations occur with retrocaecal appendix (flank or back pain), pelvic appendix (bladder or rectal symptoms), or in pregnancy where the gravid uterus displaces the appendix superiorly.

First Aid for Appendicitis

Appendicitis is surgical. There is no first aid that treats it. The role of pre-hospital action is to prevent delay and avoid making things worse:

• Do not eat or drink anything. Surgery will almost certainly be required. Oral intake after suspected appendicitis increases anaesthetic aspiration risk and may delay the operation.
• Do not take laxatives or apply heat. Laxatives increase intraluminal pressure and accelerate perforation risk. Heat masks pain and obscures clinical assessment.
• Analgesia is appropriate. Evidence shows providing paracetamol or opioid analgesia does not obscure the diagnosis.
• Call emergency services or attend to the emergency immediately. Do not wait for vomiting or for pain to worsen. Every hour of delay increases perforation risk.
• Note the symptom timeline. When pain began, its initial location, when it migrated, and the last meal as this speeds triage assessment.

When to Seek Emergency Care for Appendicitis

Appendicitis is an emergency from the moment it is suspected. Attend immediately for:

• Right lower abdominal pain with anorexia and nausea lasting more than 4-6 hours
• Sudden worsening of pain followed by brief relief 
• Fever above 38°C with right lower abdominal pain
• Rigid, board-like abdomen 
• Pain in a child under 12, a pregnant woman, or an elderly patient.

Do not wait for pain to become unbearable, for a convenient time or for spontaneous resolution as perforation can occur before any of these.

Emergency Treatment at the Hospital for Appendicitis

The treatment includes:

• Clinical assessment and scoring: The Alvarado score, combining clinical findings and blood results stratifies appendicitis probability and guides investigation priority. High score patients proceed to imaging and theatre preparation simultaneously.
• IV access: Full blood count (leucocytosis), CRP, renal function, and coagulation drawn concurrently with IV line placement. IV crystalloid commenced for rehydration and surgical preparation.
• IV analgesia: Morphine or IV paracetamol administered promptly.
• IV antibiotics: Broad-spectrum antibiotics covering Gram-negative bacilli and anaerobes are administered before surgery and continued post-operatively.
• Imaging: Ultrasound is first-line in children and pregnancy. CT abdomen with contrast is the gold standard in adults to identify perforation and abscess. MRI used in pregnancy to avoid radiation.
• Appendicectomy: Laparoscopic appendicectomy in most cases. The advantages are faster recovery, lower wound infection rates, and discharge within 24 hours in uncomplicated disease. Open surgery is indicated for perforated appendicitis with generalised peritonitis.

Do's and Don'ts During Appendicitis

Do's:

• Go to the emergency department immediately when appendicitis is suspected
• Inform medical staff of the exact time pain began and its character and location
• Take analgesia 
• Fast strictly from the point of suspecting appendicitis.

Don'ts:

• Do not take laxatives, enemas, or apply a hot water bottle to the abdomen
• Do not take antibiotics at home without medical advice 
• Do not delay attending because pain temporarily eases as sudden relief can indicate perforation, not recovery
• Do not self-diagnose and refuse hospital attendance.

Diagnostic Tests for Appendicitis

Investigations include:

• Full blood count: Leucocytosis (white cell count above 10,000/mm³) with neutrophil predominance in 80% of cases
• CRP: Usually elevated; rises proportionally with inflammation duration and severity
• Ultrasound abdomen: Identifies non-compressible appendix above 6 mm diameter, periappendiceal fluid, and hyperechoic fat
• CT abdomen with IV contrast: Identifies perforation, periappendiceal abscess, and alternative diagnoses
• MRI abdomen: Used in pregnancy to avoid ionising radiation; comparable diagnostic accuracy to CT for appendicitis
• Urine analysis: To exclude urinary tract infection and renal colic as alternative diagnoses
• Beta-hCG: Mandatory in women of childbearing age to exclude ectopic pregnancy before surgical planning.

Complications of Untreated Appendicitis

If left untreated, appendicitis can cause:

• Perforation
• Perforation converts a contained infection into peritoneal contamination causing generalised peritonitis
• Periappendiceal abscess
• Septic shock
• Pylephlebitis or septic portal vein thrombosis from appendiceal vein inflammation 
• Adhesions and bowel obstruction. 

Why Choose CARE Hospitals for Emergency Appendicitis Care

Appendicitis management from triage to theatre requires coordinated clinical assessment, imaging, anaesthesia and surgical teams without delay. At CARE Hospitals, emergency physicians and surgeons work collaboratively to decide whether to operate after imaging. CT and ultrasound are available around the clock, enabling diagnosis within the first hour of arrival. Laparoscopic surgical capability is standard so patients with uncomplicated appendicitis are typically discharged within 24 hours. For perforated appendicitis with peritonitis or septic shock, CARE's ICU provides the organ support that complex cases require.

Conclusion

Appendicitis is time-sensitive. The difference between an uncomplicated laparoscopic appendicectomy and a prolonged ICU admission for septic peritonitis is often measured in hours of delay. Pain in the right lower abdomen with anorexia and nausea is appendicitis until proven otherwise. Do not eat or drink, do not apply heat and do not wait. Call emergency services or attend CARE Hospitals emergency immediately. The earlier the diagnosis, the simpler the surgery and the faster the recovery.

FAQs

1. What is the first sign of appendicitis?

Pain around the umbilicus or central abdomen (dull and poorly localised at first) that gradually migrates to the right lower quadrant over 12 to 24 hours, accompanied by loss of appetite. This migration pattern is the most diagnostically useful early feature.

2. Is appendicitis an emergency?

Yes without surgical intervention, appendicitis progresses to perforation within 24 to 72 hours. Perforated appendicitis carries a significantly higher risk of septic complications and death than uncomplicated disease treated promptly.

3. Can appendicitis go away on its own?

Rarely, and unpredictably. Some cases of mild appendicitis resolve with antibiotics alone, but recurrence occurs in approximately 25% of patients within five years. Waiting for spontaneous resolution at home is unsafe as perforation can occur without warning.

4. Should I eat during appendicitis pain?

No. From the moment appendicitis is suspected, eat and drink nothing. Surgery under general anaesthesia requires an empty stomach and oral intake increases anaesthetic aspiration risk and may delay the operation.

5. How fast does appendicitis worsen?

Perforation typically occurs 24 to 72 hours after symptom onset, though it can happen faster particularly in children and the elderly. The rate of progression is unpredictable, which is why there is no safe window for delayed attendance.

6. Can appendicitis cause diarrhoea or constipation?

Yes both occur. A pelvic appendix adjacent to the rectum can irritate the bowel and cause loose stools or tenesmus. Reflex ileus from peritoneal irritation more commonly causes constipation and reduced bowel sounds.

7. Is appendicitis dangerous?

Uncomplicated appendicitis treated promptly carries very low mortality. Perforated appendicitis with generalised peritonitis or septic shock is life-threatening particularly in the very young, elderly, or immunocompromised.

8. What foods should be avoided?

Once appendicitis is suspected: nothing by mouth. After recovery from surgery, dietary restrictions are minimal. A light diet for the first few days post-operatively, advancing as tolerated. High-fibre foods are encouraged long-term to prevent constipation and reduce risk of future abdominal pathology.

CARE Medical Team