Can someone please tell me what the main difference between Sjögren and Fibromyalgia is? I think I may have both, or just Sjögren. I have dry eyes and dry skin, and my nose sometimes feels like it's irritated somehow (burning sensation)... However, my mouth sometimes produces too much saliva, but sometimes it feels dry... Every night I have a glass of water with me, cause I usually feel thirsty when I wake up during the night... I'm only 21 and there's no family history of Sjögren.. please help me..