Systemic Lupus Erythematosus (SLE)

What is Systemic Lupus Erythematosus (SLE)?

Systemic Lupus Erythematosus (SLE) is a complex autoimmune condition that can affect virtually any organ in the body. The hallmark butterfly-shaped facial rash occurs in about half of patients, but the disease presents differently in each individual. Lupus is more common in women of childbearing age and in certain ethnic groups. The disease can range from mild (affecting skin and joints) to severe and life-threatening (involving kidneys or central nervous system). Comprehensive autoimmune blood panels including ANA, anti-dsDNA, and complement levels are critical for diagnosis and ongoing monitoring of disease activity.

Symptoms

• ●Butterfly-shaped rash across cheeks and nose
• ●Joint pain and swelling
• ●Extreme fatigue
• ●Photosensitivity (sun sensitivity)
• ●Hair loss
• ●Mouth ulcers
• ●Fever without infection

What Causes Systemic Lupus Erythematosus (SLE)?

SLE is caused by a dysregulated immune system that produces autoantibodies attacking the body's own tissues. Genetic predisposition combined with environmental triggers such as ultraviolet light, infections, and certain medications can initiate the disease. Hormonal factors, particularly estrogen, explain the higher prevalence in women.

Risk Factors

• ⚠Female sex (9 out of 10 patients are women)
• ⚠Age 15-45 years
• ⚠Family history of lupus or autoimmune diseases
• ⚠Excessive sun exposure
• ⚠Certain ethnic backgrounds (Asian, African, Hispanic)
• ⚠Smoking

How to Prevent Systemic Lupus Erythematosus (SLE)

Avoiding excessive sun exposure and using high-SPF sunscreen are important for lupus prevention and flare management. Not smoking, managing stress, and maintaining regular medical follow-up help control the disease.

When to Get Tested

Test if you experience unexplained rash, joint pain, fatigue, and photosensitivity, especially if you are a woman of childbearing age with a family history of autoimmune diseases.

References & Sources

• [1]
  Mayo Clinic — LupusAccessed: 2026-02-24
• [2]
  CDC — Systemic Lupus ErythematosusAccessed: 2026-02-24
• [3]
  NHS — LupusAccessed: 2026-02-24