Quick answer. Appendicitis is inflammation of the appendix and is a surgical emergency, because an untreated appendix can burst within hours to days. Worsening pain that moves to the lower right side of the abdomen, with fever and nausea, needs urgent assessment at A&E.
Appendicitis is one of the most common surgical emergencies in Singapore and can affect people of any age, though it is most frequent in older children and young adults. It happens when the appendix – a small finger-shaped pouch attached to the large intestine – becomes inflamed, usually after it gets blocked. The hallmark is abdominal pain that often starts around the navel and then settles in the lower right part of the abdomen.
What makes appendicitis dangerous is its speed. An inflamed appendix can rupture, spilling infection into the abdominal cavity and leading to serious complications. Because of this, appendicitis is treated as an emergency and the usual treatment is prompt surgery to remove the appendix. This guide explains the typical symptoms, how doctors confirm the diagnosis, what surgery involves, and the warning signs that mean you should go to A&E without delay.
At a glance
| Stage | Typical feature | What it suggests |
|---|---|---|
| Early | Vague pain around the navel, loss of appetite | Inflammation beginning |
| Classic | Pain shifts to the lower right abdomen, worse on movement | Localised appendicitis |
| With infection | Fever, nausea, vomiting, tenderness on the right | Established appendicitis |
| Warning | Sudden severe whole-abdomen pain after the original pain | Possible rupture – emergency |
| Atypical | Pain felt elsewhere (e.g. in pregnancy or in children) | Needs prompt medical review |
What is appendicitis?
Appendicitis is inflammation of the appendix, a small pouch that projects from the start of the large intestine on the lower right side of the abdomen. It usually develops when the opening of the appendix becomes blocked – by hardened stool, swelling or, less often, other causes – allowing bacteria to multiply and the appendix to swell and fill with pus.
It is among the most common reasons for emergency abdominal surgery in Singapore and most often affects people between their teens and thirties, although it can occur at any age. Appendicitis is considered a surgical emergency because an inflamed appendix can burst, and the standard treatment is surgical removal.
Symptoms & signs
The classic pattern is pain that begins around the navel and over several hours moves to the lower right abdomen, becoming sharper and worse with movement, coughing or pressing. Other common features include:
- Loss of appetite
- Nausea and sometimes vomiting
- A low-grade fever that may rise as the illness progresses
- Tenderness over the lower right abdomen, often worse when pressure is released
- Constipation, diarrhoea or bloating
Symptoms can be less typical in young children, older adults and pregnant women, so any persistent or worsening abdominal pain should be assessed.
Causes & risk factors
Appendicitis is usually caused by a blockage of the appendix that traps bacteria and triggers inflammation. The blockage can result from:
- Hardened stool (faecaliths)
- Swelling of lymphoid tissue in the appendix wall, often after an infection
- Less commonly, other obstructions within the appendix
It is most common in adolescents and young adults, and there may be a slightly higher likelihood if a close family member has had it. In most cases there is no way to predict or prevent appendicitis.
How it's diagnosed
Diagnosis starts with a careful history and a physical examination, focusing on tenderness in the lower right abdomen. Doctors usually combine the examination with:
- Blood tests – to look for raised inflammatory and white-cell markers
- Urine test – to help rule out a urinary infection or kidney stone
- Ultrasound – often used first, especially in children and pregnant women
- CT scan – frequently used in adults to confirm the diagnosis and exclude other causes
Because the consequences of a missed appendicitis are serious, doctors may recommend surgery based on a strong clinical picture even when scans are not fully conclusive.
Treatment options
The standard treatment for appendicitis is an appendicectomy – surgical removal of the appendix – usually performed as an emergency. It is most often done by keyhole (laparoscopic) surgery through a few small incisions, which generally allows a quicker recovery, though open surgery may be needed if the appendix has ruptured or there are complications. Antibiotics are given around the time of surgery.
As emergency inpatient surgery, an appendicectomy in Singapore is generally MediSave-claimable up to the applicable surgical withdrawal limits, with further support possible from MediShield Life or an Integrated Shield Plan; subsidised rates apply in public hospitals. Because appendicitis is treated urgently, the priority is timely surgery rather than comparing prices – confirm cost and claim details with the hospital afterwards.
When to see a doctor & which specialist
Appendicitis is a surgical emergency. Go to A&E now, or call 995 if you have worsening pain in the lower right abdomen, especially with fever, nausea, vomiting or pain that becomes severe and spreads across the whole abdomen – the last of these can mean the appendix has ruptured. Do not eat, drink or take painkillers that may mask symptoms while waiting to be assessed, as you may need surgery.
Appendicitis is managed by general and gastrointestinal surgeons in the emergency setting. For non-urgent abdominal symptoms, or follow-up after surgery, you can find a relevant specialist through our directory of gastroenterologists and GI surgeons in Singapore.
What to expect in hospital
If appendicitis is suspected at A&E, you will be assessed quickly with blood tests and usually a scan, and kept nil by mouth in case surgery is needed. Pain relief, fluids through a drip and sometimes antibiotics are started while a decision is made. Keyhole (laparoscopic) appendicectomy is the usual operation, after which most people stay in hospital for one to a few days, depending on whether the appendix had ruptured.
Recovery after surgery
Recovery from keyhole surgery is generally faster than open surgery. Expect some tenderness around the small incisions for a week or two. Most people return to light activities within a week and to fuller activity over a few weeks, avoiding heavy lifting until cleared by the surgeon. Follow wound-care advice, take pain relief as prescribed, and contact your doctor if you develop fever, increasing pain, redness or discharge from a wound.
Special situations
Appendicitis can be harder to recognise in young children, older adults and during pregnancy, where the pain may be felt in a different place or be less typical. In these groups, any persistent or worsening abdominal pain deserves prompt medical review rather than waiting to see if it settles.
Common questions
Can appendicitis be treated with antibiotics alone?
In selected uncomplicated cases antibiotics are sometimes used, but surgery remains the standard treatment because symptoms can return. Your surgeon will advise what is safest for you.
Can I prevent appendicitis?
There is no proven way to prevent it. The most important thing is to seek urgent care early if the typical pain develops.
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- gastroenterology clinics directory
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- Spondylosis
- Mastitis
Sources
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