Re: Skin changes
Flahers, hi. There isn't a single blood test that proves or disproves lupus. To be Dx'ed with systemic lupus (SLE), you generally have to meet 4 or more of 11 diagnostic criteria. For these, see the "sticky posts" ( = permanent informational posts) at the top of the thread list. By the way, the criteria don't have to be met all at once: you may meet them over time.
Plus, there are lesser forms, sometimes called "subsets", for which you may meet less than 4 criteria. Discoid lupus erythematosus (DLE) is considered the mildest (although it may have huge cosmetic impact). Subacute cutenaous lupus erythematosus (SCLE) is viewed as usually intermediate; but in it, the full range of problems seen in SLE is actually possible but less likely. And in drug-induced lupus (DILE), symptoms typically recede when the offending drug(s) is/are discontinued.
Sun also bothers many people who don't have lupus, I think. While on holiday, you could wear sunblock, hat with wide brim, long sleeves & trousers, etc. Or carry a sun parasol. I hope you can fully enjoy your holiday---have fun! Best wishes, Vee