Which environmental factors can trigger lupus symptoms in genetically predisposed people?

In individuals with a genetic predisposition to lupus, several environmental stimuli can trigger a severe immune response and the onset of symptoms. These factors include:

• Infections: Certain viral infections, particularly the Epstein-Barr virus, are associated with an increased risk of developing systemic lupus.1
• Ultraviolet Light: Exposure to ultraviolet radiation is a known trigger that can cause skin rashes and photosensitivity.12
• Medications: Certain prescribed drugs can induce a lupuslike condition. Common examples include hydralazine (used for high blood pressure) and procainamide (for irregular heart rhythms), as well as various anticonvulsants, isoniazid, penicillin, and penicillamine. Symptoms typically abate once the medication is discontinued.12
• Extreme Stress: Significant physical or emotional stress has the potential to trigger an immune response and the recurrence of symptoms.1

While these factors can stimulate the disease, it is important to note that lupus is fundamentally an autoimmune disorder involving a complex breakdown of the immune system's normal function.13