Systemic Lupus Erythematosus (SLE)
What is Systemic Lupus Erythematosus (SLE)?
Systemic Lupus Erythematosus, often called SLE or lupus, is a chronic autoimmune disease. This means your immune system attacks healthy tissue in your own body instead of protecting you from illness. The condition can affect nearly any organ, including your skin, joints, kidneys, heart, lungs, blood vessels, and brain.
SLE causes inflammation throughout the body. This inflammation leads to pain, swelling, and tissue damage over time. The disease tends to have periods of flares, when symptoms get worse, and remission, when symptoms improve or disappear. Lupus affects about 1.5 million Americans, and most people are diagnosed between ages 15 and 44.
Women develop SLE about 9 times more often than men. The disease is also more common and more severe in Black, Hispanic, Asian, and Native American populations. While there is no cure for lupus, early diagnosis and treatment can help manage symptoms and prevent serious organ damage.
Symptoms
Lupus symptoms vary widely from person to person. Many symptoms come and go, making the disease hard to diagnose at first. Common signs include:
- Extreme fatigue that does not improve with rest
- Joint pain, stiffness, and swelling, especially in hands, wrists, and knees
- Butterfly-shaped rash across the cheeks and nose
- Skin rashes that appear or worsen in sunlight
- Fever with no clear cause
- Hair loss or thinning
- Fingers or toes turning white or blue in cold temperatures
- Chest pain with deep breathing
- Mouth or nose sores
- Swelling in legs, feet, or around eyes
- Memory problems or confusion
- Headaches
Some people have mild symptoms that develop slowly over years. Others experience sudden, severe symptoms. Because lupus symptoms can mimic other conditions, getting tested is important if you have ongoing, unexplained symptoms.
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Causes and risk factors
The exact cause of SLE is not fully understood. Researchers believe it develops from a combination of genetic factors and environmental triggers. Your genes may make you more likely to develop lupus, but something in your environment usually triggers the disease to become active. Common triggers include sunlight exposure, infections, certain medications, and extreme stress.
Risk factors for developing SLE include being female, especially during childbearing years, having a family history of lupus or other autoimmune diseases, and certain ethnic backgrounds. Hormones may play a role since women develop lupus much more often than men. Smoking increases your risk and can make symptoms worse. While you cannot prevent lupus entirely, avoiding known triggers and maintaining a healthy lifestyle may help reduce flares once diagnosed.
How it's diagnosed
Diagnosing SLE can be challenging because symptoms vary so much between people. Doctors use a combination of your medical history, physical exam, and blood tests to make a diagnosis. Blood work is essential for detecting the antibodies and inflammation markers that indicate lupus. Key tests include ANA Screen to detect antinuclear antibodies, DNA (dsDNA) Antibody tests to identify antibodies that attack your own DNA, and Complement Component C3C to measure inflammation levels.
Additional tests may include Cardiolipin Antibodies, Sed Rate to measure inflammation, and other autoimmune markers. Rite Aid offers comprehensive autoimmune testing through our add-on panels at Quest Diagnostics locations nationwide. Getting tested early can help you start treatment sooner and prevent organ damage. Your doctor may also order kidney function tests, blood counts, and urine tests to check if lupus has affected your organs.
Treatment options
While there is no cure for SLE, treatment focuses on managing symptoms, preventing flares, and protecting your organs from damage. Your treatment plan will depend on which organs are affected and how severe your symptoms are.
- Protect your skin from sun exposure with sunscreen, hats, and protective clothing
- Get adequate rest and manage stress through relaxation techniques
- Exercise regularly to reduce joint stiffness and fatigue
- Eat an anti-inflammatory diet rich in fruits, vegetables, and omega-3 fatty acids
- Avoid smoking and limit alcohol consumption
- Take nonsteroidal anti-inflammatory drugs for joint pain and fever
- Use antimalarial medications like hydroxychloroquine to control symptoms
- Take corticosteroids to reduce inflammation during flares
- Use immunosuppressive drugs for severe cases affecting major organs
- Consider biologics that target specific immune system components
Regular monitoring with blood tests helps your doctor track disease activity and adjust treatments. Working closely with a rheumatologist, a doctor who specializes in autoimmune diseases, is important for long-term care. Many people with lupus live full, active lives with proper treatment and lifestyle changes.
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Frequently asked questions
Most people with lupus who receive proper treatment can expect to live a normal or near-normal lifespan. Modern treatments have greatly improved outcomes over the past 50 years. The key is early diagnosis, consistent treatment, and regular monitoring with your doctor. Serious complications are less common when lupus is well-managed.
Lupus is a chronic condition that does not go away completely. You may experience long periods of remission when you have few or no symptoms. These quiet periods can last months or even years. Treatment helps extend remission periods and prevent flares, but the underlying disease remains present.
No, lupus is not contagious. You cannot catch lupus from someone else or spread it to other people. SLE is an autoimmune disease caused by your own immune system attacking your body. While genetics play a role, simply being around someone with lupus poses no risk.
Common lupus triggers include sun exposure, infections, stress, lack of sleep, and stopping medications. Certain drugs and supplements can also cause flares. Hormonal changes during pregnancy or menstruation may trigger symptoms in some women. Identifying your personal triggers helps you avoid flares and manage the disease better.
Both are autoimmune diseases that cause joint pain, but they affect the body differently. Rheumatoid arthritis mainly attacks the joints and can cause permanent joint damage. Lupus can affect many organs including skin, kidneys, heart, and brain in addition to joints. Different blood tests and antibodies help doctors tell these conditions apart.
Yes, most women with lupus can have healthy pregnancies. Planning your pregnancy during a period of remission is important. You will need close monitoring by both your rheumatologist and a high-risk obstetrician. Some lupus medications must be stopped before pregnancy, so talk to your doctor well in advance.
Avoid alfalfa sprouts, which contain an amino acid that may trigger flares. Limit processed foods high in salt and sugar, which increase inflammation. Some people find that nightshade vegetables like tomatoes and peppers worsen symptoms. Alcohol can interfere with medications and should be limited or avoided.
About 5 to 10 percent of healthy people test positive for ANA without having lupus. Positive ANA results also occur with other autoimmune diseases, infections, and certain medications. Your doctor looks at your symptoms, physical exam findings, and other specific antibody tests to diagnose lupus. A positive ANA alone is not enough for a diagnosis.
Testing frequency depends on your disease activity and treatment plan. During active disease or medication changes, you may need tests every few weeks. Once your condition is stable, testing every 3 to 6 months is typical. Regular blood work helps your doctor catch problems early and adjust your treatment before symptoms worsen.
Yes, lupus can affect your brain and mental health in several ways. The disease itself can cause memory problems, confusion, and mood changes. Living with a chronic illness also increases risk for depression and anxiety. Some medications used to treat lupus may affect mood as well. Talk to your doctor if you experience mental health symptoms.