What is ultraviolet light?
Ultraviolet (UV) light is invisible radiation from the sun that has three different ranges of wavelengths, called UVA, UVB and UVC (which does not reach us because it is absorbed by the atmosphere). In general, UVA mostly ages the skin and UVB mostly burns the skin ("A Ages, B Burns"), although UVB also contributes considerably to skin aging and cancer. Of most concern to those with lupus is the short ultraviolet wave UVB, however, broad spectrum UVA is also capable of causing skin rashes (lesions) and flare symptoms in those with lupus but to a lesser extent than UVB.
Medically reviewed on August 08, 2013