Join pain with Lupus is generally inflammation in the muscles around the joint, sometimes in the joint itself. Since the sun causes inflammation (a regular sunburn is how the skin shows inflammation), it making you tired or prompting joint pain is fairly normal.
However, this isn't one of the deciding characteristics of Lupus. If you are worried about
it, see a Rheumotologist and get yourself checked out -- but a sun sensitivity by itself doesn't mean you have lupus, it just means you are sensitive to the sun!
Lynnwood, Lupus & Sjogren's ModeratorDIAGNOSING LUPUS & LUPUS RESOURCES
"Life is far too important to be taken seriously" - Oscar Wilde