From the Guidelines
No, sun bathing every day for hours over years does not cause lupus, but it can trigger lupus flares in people who already have the condition. Lupus is an autoimmune disease that develops due to a combination of genetic predisposition and environmental triggers, not solely from sun exposure [ 1 ]. However, excessive sun exposure can worsen symptoms in people with lupus. Ultraviolet (UV) radiation from the sun can damage skin cells, causing them to die and release their contents, which may trigger an immune response in genetically susceptible individuals.
Key Points to Consider
- For those with lupus, sun protection is essential - using broad-spectrum sunscreen (SPF 50+), wearing protective clothing, and limiting sun exposure, especially between 10 AM and 4 PM [ 1 ].
- The development of lupus itself requires multiple factors beyond just sun exposure, including genetic factors, hormonal influences, and possibly other environmental triggers like certain medications or infections.
- Photoprotection should be advised for the prevention of flares in people with Systemic Lupus Erythematosus (SLE) [ 1 ].
- Experimental studies have shown that broad-spectrum sunscreens prevent cutaneous lesions on photo-provocation [ 1 ].
Recommendations for People with Lupus
- Avoid direct sun exposure, especially during days with high UV index [ 1 ].
- Use physical barriers such as hats, sunglasses, and long-sleeved shirts and pants [ 1 ].
- Use broad-spectrum sunscreen and assess the need for vitamin D supplements when indicated [ 1 ].
From the Research
Lupus and Sun Bathing
- There is no direct evidence in the provided studies to suggest that sun bathing every day for hours for years can cause lupus 2, 3, 4, 5, 6.
- The studies primarily focus on the treatment and management of systemic lupus erythematosus (SLE) using hydroxychloroquine (HCQ) and other medications.
- They discuss the benefits and risks of HCQ treatment, including its efficacy in preventing SLE flares, reducing disease activity, and improving patient-reported outcomes 2, 3, 4, 5, 6.
- However, none of the studies investigate the potential link between sun bathing and the development of lupus.
Sun Exposure and Lupus
- While the provided studies do not address the specific question of sun bathing and lupus, it is known that ultraviolet (UV) radiation from the sun can trigger or exacerbate lupus symptoms in some individuals.
- However, this information is not supported by the provided evidence, and further research would be needed to determine the relationship between sun bathing and lupus development.
- The current studies focus on the treatment and management of SLE, rather than its causes or triggers 2, 3, 4, 5, 6.