Lupus

What is lupus?

Lupus is a long-term autoimmune disease. Autoimmune means that the immune system, which normally protects the body from infection, mistakenly attacks the body’s own healthy tissues. In lupus this misdirected immune response causes inflammation (swelling, heat and irritation) that can affect the skin, joints, kidneys, blood cells, heart, lungs and brain. Because it can involve so many different parts of the body, lupus is sometimes described as a systemic disease, meaning it affects the whole system rather than one organ.

The most common and most serious form is systemic lupus erythematosus, usually shortened to SLE. When people ask what is lupus, they are usually referring to SLE. Other forms include cutaneous lupus, which mainly affects the skin; drug-induced lupus, which is triggered by certain medications and often improves when the medication is stopped; and neonatal lupus, a rare condition in newborns whose mothers carry particular antibodies.

Lupus can develop at any age, but it most often begins between the teenage years and the mid-forties. It is far more common in women than in men, and it appears more frequently in people of African, Hispanic, Asian and Indigenous heritage than in people of European heritage. Lupus is not contagious and cannot be passed from one person to another through contact.

Lupus tends to follow a pattern of flares, when symptoms become worse, and periods of remission, when symptoms ease or disappear. This unpredictable course is one of the reasons the condition can be difficult to live with and difficult to diagnose.

Lupus symptoms

Lupus symptoms vary widely from one person to another. Some people have only mild joint and skin problems, while others develop inflammation in major organs. Symptoms may appear gradually or suddenly, and they may change over time. Common lupus symptoms include:

• Fatigue that is persistent and not relieved by rest
• Joint pain, stiffness and swelling, often in the hands, wrists and knees, frequently on both sides of the body
• Skin rashes, including a butterfly-shaped rash across the cheeks and bridge of the nose (called a malar rash)
• Sensitivity to sunlight, where rashes or other symptoms flare after sun exposure
• Low-grade fever without an obvious infection
• Hair thinning or hair loss
• Mouth or nose sores, which are often painless
• Chest pain when breathing deeply, which may indicate inflammation of the lining around the lungs or heart
• Fingers or toes turning white or blue in the cold, a circulation problem known as Raynaud’s phenomenon
• Swelling in the legs or around the eyes, which can be a sign of kidney involvement

Symptoms differ depending on the type of lupus. Cutaneous lupus mostly produces skin changes, such as round, scaly patches (discoid lesions) that may leave scars, without affecting internal organs. Drug-induced lupus usually causes joint pain, muscle pain and fever and rarely involves the kidneys or brain. SLE can produce any combination of the symptoms above and, in some people, more serious complications.

In more advanced or severe disease, lupus may affect the kidneys (lupus nephritis), causing protein in the urine and high blood pressure; the blood, causing anemia or low counts of white blood cells or platelets; and the nervous system, causing headaches, confusion, seizures or mood changes. Not everyone with lupus develops these problems, and many people have periods when they feel well.

Causes and risk factors

The exact lupus causes are not fully understood. Researchers believe that lupus develops when a person who has a genetic tendency toward the disease is exposed to something in the environment that triggers the immune system. In other words, genes alone do not usually cause lupus, and an environmental trigger alone does not usually cause it either; it is often the combination that matters.

Factors that are thought to contribute include:

• Genetics. Lupus runs in some families, and many genes have been linked to a higher chance of developing it. However, most people with lupus do not have a close relative with the disease.
• Hormones. Because lupus is much more common in women, particularly during the reproductive years, female hormones such as estrogen are believed to play a role.
• Sunlight. Ultraviolet light can trigger skin lesions and, in some people, a wider flare of the disease.
• Infections. Certain viral infections may set off the immune system in people who are already susceptible.
• Medications. Some blood pressure medicines, anti-seizure medicines and antibiotics can cause drug-induced lupus, which usually resolves after the medication is stopped under medical guidance.
• Other environmental exposures. Smoking, silica dust and significant physical or emotional stress have been studied as possible triggers, though the evidence is less certain.

Risk factors that increase the likelihood of developing lupus include being female, being between about 15 and 45 years of age, having a family history of lupus or other autoimmune diseases, and having African, Hispanic, Asian or Indigenous ancestry. Having a risk factor does not mean a person will develop lupus, and people without any known risk factor can still be affected.

Lupus diagnosis

Reaching a lupus diagnosis can take time, sometimes months or even years. There is no single test that confirms lupus. Instead, doctors combine a careful medical history, a physical examination and a series of laboratory tests, and then compare the findings with internationally recognized classification criteria. Because lupus symptoms overlap with many other conditions, doctors also work to rule out other explanations.

Tests that are commonly used include:

• Antinuclear antibody (ANA) test. This blood test looks for antibodies that attack the nucleus of the body’s own cells. Most people with lupus test positive, but a positive ANA can also occur in healthy people and in other conditions, so it is not proof of lupus on its own.
• Specific antibody tests. Tests for anti-double-stranded DNA (anti-dsDNA) and anti-Smith (anti-Sm) antibodies are more specific to lupus. Antiphospholipid antibodies may also be checked because they are linked to blood-clotting problems.
• Complement levels. Complement proteins are part of the immune system and are often low when lupus is active.
• Complete blood count. This can show anemia or low white blood cell or platelet counts.
• Kidney and liver function tests. Blood tests measure how well these organs are working.
• Urinalysis. A urine sample is checked for protein or blood, which may signal kidney inflammation.
• Inflammation markers. Tests such as erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) indicate general inflammation.

Depending on the symptoms, doctors may also order imaging. A chest X-ray or echocardiogram (an ultrasound of the heart) can detect fluid or inflammation around the lungs or heart. If kidney involvement is suspected, a kidney biopsy, in which a small sample of kidney tissue is removed with a needle and examined under a microscope, may be recommended to determine how severe the inflammation is and to guide treatment. A skin biopsy may be used when the diagnosis of cutaneous lupus is uncertain.

Lupus is usually diagnosed and managed by a rheumatologist, a doctor who specializes in autoimmune and joint diseases. Within Acibadem, this care is generally provided through the Rheumatology Department, often in coordination with kidney, skin and other specialists when specific organs are affected.

Lupus treatment options

There is currently no cure for lupus, but lupus treatment options have improved considerably over recent decades, and many people are able to control their symptoms and prevent organ damage. Treatment is tailored to the individual, based on which parts of the body are affected and how active the disease is. Plans are often adjusted over time as symptoms change.

Monitoring and observation. People with very mild disease may need only regular check-ups, blood and urine tests, and lifestyle measures such as sun protection. Ongoing monitoring is important even when symptoms are quiet, because kidney or blood problems can develop without obvious warning signs.

Medications. Medications are the main form of lupus treatment. Commonly used groups include:

• Nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen or naproxen, to relieve joint pain, swelling and fever in mild cases.
• Antimalarial drugs, particularly hydroxychloroquine. Although originally developed for malaria, these medicines help control skin and joint symptoms, reduce flares and may lower the risk of long-term organ damage. Regular eye examinations are advised while taking them.
• Corticosteroids, such as prednisone, which reduce inflammation quickly. Because long-term use can cause side effects including weight gain, bone thinning, high blood pressure and raised blood sugar, doctors generally aim for the lowest effective dose for the shortest time.
• Immunosuppressants, such as azathioprine, mycophenolate, methotrexate or cyclophosphamide. These medicines dampen the immune system and are used when major organs, particularly the kidneys, are involved. They increase the risk of infection and require regular blood tests.
• Biologic therapies, which are targeted medicines that block specific parts of the immune response. Some are approved for lupus and lupus nephritis and may be considered when standard treatments are not sufficient.
• Other supportive medicines, such as blood pressure medicines to protect the kidneys, blood thinners for people with clotting antibodies, and medicines to protect the bones.

Procedures. Procedures are not a routine part of lupus care, but they may be needed in specific situations. For example, if fluid builds up around the lungs or heart, it may need to be drained. In rare, severe cases affecting the blood or nervous system, a treatment called plasma exchange, which filters antibodies from the blood, may be considered.

Surgery. Surgery is not a treatment for lupus itself. It may be needed for complications, such as joint replacement when long-standing inflammation or steroid use has damaged a joint, or dialysis and kidney transplant if the kidneys fail despite treatment.

Rehabilitation and self-care. Physical therapy and gentle, regular exercise can help maintain joint flexibility, muscle strength and energy levels. Occupational therapy may help with everyday tasks during flares. Doctors also commonly advise strict sun protection with clothing and broad-spectrum sunscreen, not smoking, a balanced diet, adequate rest, keeping vaccinations up to date as advised by the treating team, and managing stress where possible.

Living with lupus and outlook

The outlook for people with lupus has improved substantially, and with appropriate treatment and follow-up many people live full lives with a normal or near-normal life expectancy. However, lupus remains a serious condition, and the course is difficult to predict. Some people experience long periods of remission, while others have frequent flares. Involvement of the kidneys, heart, lungs or brain carries a higher risk of complications and requires closer monitoring.

Living with lupus often means learning to recognize personal triggers and early warning signs of a flare, taking medications consistently, and attending regular appointments even when feeling well. Fatigue and pain can affect work, relationships and mood, and depression and anxiety are common in people with long-term illness. Support from family, patient organizations and, where appropriate, mental health professionals can be a valuable part of care.

People with lupus also have a higher long-term risk of cardiovascular disease, infections and osteoporosis (thinning of the bones), partly because of the disease and partly because of some treatments. Managing blood pressure, cholesterol and blood sugar, staying active and avoiding smoking are therefore particularly important.

Pregnancy is possible for many women with lupus, but it is generally considered higher risk, especially if the disease is active or the kidneys are involved. Doctors usually recommend planning pregnancy during a period of stable disease and adjusting medications beforehand, because some lupus medicines are not safe in pregnancy.

Frequently asked questions

What is lupus and is it the same as arthritis?

Lupus is an autoimmune disease in which the immune system attacks the body’s own tissues, causing inflammation in the skin, joints and sometimes internal organs. Joint pain and swelling are common lupus symptoms, so it is sometimes confused with arthritis, but lupus is a broader condition that can affect many organs, whereas arthritis refers specifically to joint inflammation. A rheumatologist can help distinguish between the two.

What are the first lupus symptoms people usually notice?

Early lupus symptoms are often vague and may include tiredness that does not improve with rest, aching or swollen joints, unexplained low-grade fever, hair thinning and skin rashes that worsen in sunlight. Because these symptoms are also seen in many other conditions, they are easily overlooked, which is one reason a lupus diagnosis can take time.

What are the main lupus causes?

Lupus causes are not fully understood. It appears to result from a combination of genetic susceptibility and environmental triggers such as sunlight, infections, certain medications and hormonal factors. Having a family member with lupus increases the chance of developing it, but most people with lupus do not have an affected relative, and no single cause has been identified.

How is a lupus diagnosis confirmed?

No single test confirms lupus. Doctors combine symptoms, a physical examination and blood and urine tests, including the antinuclear antibody (ANA) test and more specific antibody tests, and compare the findings with established classification criteria. In some cases a kidney or skin biopsy is needed. A positive ANA test alone does not mean a person has lupus.

What are the current lupus treatment options?

Lupus treatment options include anti-inflammatory medicines, antimalarial drugs such as hydroxychloroquine, corticosteroids, immunosuppressants and targeted biologic therapies, chosen according to which organs are affected and how active the disease is. Treatment also involves sun protection, regular monitoring and lifestyle measures. There is no cure, but many people achieve good control of their symptoms.

Can lupus go away on its own?

Lupus is a lifelong condition and does not usually go away permanently. Many people do experience remission, when symptoms are minimal or absent, sometimes for long periods, and drug-induced lupus often resolves once the triggering medicine is stopped. Even during remission, doctors generally recommend continued follow-up because the disease can flare again.

Is lupus life-threatening?

Lupus can be life-threatening if it causes severe inflammation of the kidneys, heart, lungs or brain, or serious blood clots or infections. With modern treatment and regular monitoring, however, most people with lupus live long lives, and serious complications have become less common. Outcomes depend on how the disease affects each individual and how consistently it is managed.

When to see a doctor

Anyone who has persistent unexplained fatigue, joint pain, rashes that worsen in the sun, mouth sores or recurrent fevers should discuss these symptoms with a doctor, particularly if several occur together. People who already have a lupus diagnosis should report new or worsening symptoms, since early adjustment of treatment can help prevent organ damage.

Seek urgent medical attention if any of the following occur:

• Chest pain, especially pain that worsens with deep breathing, or sudden shortness of breath
• Severe headache, confusion, seizures, weakness on one side of the body or difficulty speaking
• Sudden swelling of the legs, feet or around the eyes, or a marked decrease in urine output
• Blood in the urine or dark, foamy urine
• High fever, especially while taking corticosteroids or immunosuppressant medicines, which can mask or worsen infections
• Unusual bleeding or bruising, or very pale skin combined with dizziness
• Pain, swelling or redness in one leg, which may indicate a blood clot
• A sudden, widespread or blistering rash, or severe new skin reaction after starting a medication

These signs can indicate involvement of vital organs or serious complications and should not wait for a routine appointment.