Quick answer. Systemic lupus erythematosus (SLE), or lupus, is a chronic autoimmune disease in which the immune system attacks the body’s own tissues, affecting multiple organs including the skin, joints, kidneys, blood and brain. It is far more common in women of childbearing age and is two to three times more common, and often more severe, in Asians compared with Caucasians. Lupus tends to flare and settle over time, with triggers such as sunlight, infection and stress. Common signs include a butterfly-shaped facial rash, joint pain, fatigue, mouth ulcers and hair loss. Anyone with these features, especially a young woman with unexplained multi-system symptoms, should see a rheumatologist for assessment. This is general information, not medical advice.
Lupus, or systemic lupus erythematosus (SLE), is one of the most complex autoimmune diseases managed by rheumatologists. Because it can affect almost any organ, its symptoms vary widely from person to person, which can make it difficult to recognise. In Singapore, lupus is an important condition: it is estimated to affect around nine in every 10,000 people, with several thousand patients cared for across the major hospitals, and it is more common and tends to be more severe in Asians. This guide explains who gets lupus, the range of symptoms, what triggers flares, how it is diagnosed and treated, and when to see a rheumatologist.
At a glance
| System | Examples of symptoms | Why it matters |
|---|---|---|
| Skin | Butterfly (malar) rash, sun sensitivity, hair loss | Often the first visible sign |
| Joints | Pain, stiffness, swelling | Very common, can mimic other arthritis |
| Kidneys | Leg swelling, frothy urine | Lupus nephritis needs early treatment |
| Blood | Easy bruising, anaemia, low counts | Detected on blood tests |
| Lungs/heart | Chest pain, breathlessness | Can reflect inflammation of linings |
| General | Fatigue, fever, mouth ulcers | Frequent during flares |
Who gets lupus, and why is it more common in Asian women?
Lupus predominantly affects women of childbearing age, roughly between 15 and 45 years, and occurs far more often in women than in men. It is also more common in Asians than in Caucasians, with studies showing two to three times higher prevalence and often more severe disease, including a higher rate of kidney involvement. In Singapore-based data the majority of female patients are of Chinese ethnicity, reflecting the local population, with Malay, Indian and other groups also affected. Genetic and hormonal factors are thought to contribute to this pattern, though the exact cause of lupus remains unknown.
What are the symptoms of lupus?
Because lupus is a multi-system disease, symptoms can range from mild to serious. Skin and mucous membrane signs are common, including the classic butterfly-shaped (malar) rash across the cheeks and nose, sensitivity to sunlight, mouth ulcers and hair loss. Joint pain and swelling, fatigue and low-grade fever are also frequent. More serious involvement can affect the kidneys (lupus nephritis, causing leg swelling or frothy urine), the blood (anaemia, low platelets or white cells), the lungs and heart linings, and occasionally the brain (causing seizures, confusion or memory problems). Raynaud’s phenomenon, where fingers change colour in the cold, can also occur.
What are flares, and what triggers them?
Lupus typically follows a relapsing-remitting course, with periods of increased disease activity called flares alternating with quieter phases. Recognised triggers include ultraviolet exposure from sunlight, infections, certain medications, hormonal changes and physical or emotional stress. Learning to recognise early flare symptoms and avoiding known triggers, for example by using sun protection, is an important part of living with lupus. Patients on immune-suppressing treatment should also be alert to infections, which in the local context can include a higher attention to tuberculosis risk.
How is lupus diagnosed?
There is no single test for lupus; diagnosis is based on the combination of symptoms, examination and blood tests. Key autoantibody tests include the antinuclear antibody (ANA), anti-double-stranded DNA, anti-Smith and anti-Ro/La antibodies, along with complement levels and other markers. Doctors also check kidney and liver function, blood counts, inflammatory markers and a urine test to look for kidney involvement. In some cases a kidney or skin biopsy is needed. A rheumatologist puts these results together to confirm the diagnosis and assess which organs are involved.
How is lupus treated?
Treatment is tailored to disease severity and the organs affected. Hydroxychloroquine, an antimalarial drug, is a foundational therapy that helps reduce flares and protect against complications, and most patients stay on it long term. Corticosteroids are used to bring inflammation under control quickly, while immunosuppressants such as mycophenolate, azathioprine or cyclophosphamide are used for more serious organ involvement. Biologic therapies such as belimumab or rituximab target specific parts of the immune system in selected patients. Supportive medications, sun protection and managing blood pressure and cardiovascular risk are also important. All drug choices and doses are individualised by the rheumatologist.
When should you see a rheumatologist for lupus?
Lupus should be managed by a rheumatologist, often through dedicated lupus clinics that provide multidisciplinary care. You should seek assessment if you have a combination of unexplained features such as a facial rash worsened by sun, persistent joint pain, marked fatigue, mouth ulcers, hair loss, or signs of kidney involvement like leg swelling or frothy urine, particularly as a younger woman. Early diagnosis and treatment help prevent organ damage and improve long-term outcomes. With modern care, many people with lupus in Singapore manage their condition well.
Living well with lupus day to day
Alongside medication, some practical habits help reduce flares and protect long-term health. Sun protection is important because ultraviolet light can trigger both skin and systemic flares, so broad-spectrum sunscreen, hats and shade are worth building into your routine, including on bright but cloudy days. Aim for regular, gentle exercise within your energy limits, adequate sleep, and ways to manage stress, which is a recognised trigger. Because many lupus medications affect the immune system, stay up to date with recommended vaccinations after discussing timing with your doctor, and seek care early for fevers or signs of infection. Do not stop hydroxychloroquine or other long-term medicines on your own, even when you feel well, as this can precipitate a flare.
Lupus and pregnancy
Many women with lupus have healthy pregnancies, but pregnancy is best planned for a period when the disease is stable, ideally with advice from your rheumatologist beforehand. Some medications are not suitable in pregnancy and may need to be adjusted in advance, while others are continued, so never change treatment without guidance. Closer monitoring is usually arranged because lupus can affect blood pressure, the kidneys and the developing baby. Discuss contraception and pregnancy plans openly with your care team so the safest approach can be chosen for you.
Common questions
Is lupus inherited?
Lupus is not passed down in a simple way. Genetic factors contribute to risk, but most relatives of someone with lupus never develop it. The exact cause remains unknown.
Will I need to take medication for life?
Many people stay on a foundational medicine such as hydroxychloroquine long term to reduce flares, while other drugs may be increased during flares and reduced when the disease is quiet. Your rheumatologist tailors this over time.
Related guides
- Best Rheumatology Clinics in Singapore — our editorial shortlist
- rheumatology clinics directory
- Rheumatoid arthritis
- Psoriatic arthritis / AS
- When to see a rheumatologist
Sources
- National University Hospital – SLE
- SGH/HealthXchange – Systemic Lupus Erythematosus
- SGH – Lupus patients and tuberculosis risk
- Meta-analysis of clinical manifestations in Asian SLE (ScienceDirect)
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