Hello Drysufferer, and welcome to Sjogren's World.
By extremely dry, do you mean dried out to the point of splitting or cracking? I've been there, but for the most part, my dry skin is shiny, flaky, with thickened rough patches on knees and elbows. I sometimes feel like I'm singlehandedly supporting the cosmetic's industry, lotions department.
My rheumy didn't seem in the least bit surprised by the dryness of my skin and said it could be even worst. I had to tell him that I have always "lotioned up" before seeing him, so he hasn't seen it at it's worst! I hope to be seeing a new dermatologist soon (no dissatisfaction with the last one, he suggested a change, because he hoped a fresh eye might be more helpful) and she may have more insight, which I will, of course, pass on.
I use several different lotions, hoping to get the various benefits working together...I basically keep a different formula in every room and apply liberally.
This skin condition was progressively getting worse as my other SjS symptoms were starting, but it wasn't my first sign. Since SjS is highly individual, it's very possible to have your own personal blend of symptoms, and if dry mouth and swollen glands aren't among your's, lucky you! Have you been diagnosed, or are you still in the "I wonder if it could be..." limboland?
As you browse the posts here, you'll find so many stories that speak directly to you, and lots of helpful information on coping with the symptoms.