My gums have always been pink. A few days ago I noticed that they are lighter with some dark spots. My lip have also changed from pink to pink with a dark line around them. It looks like I have a natural purple lip liner.

What could cause this? I have been on Plaquenil (Hydroxichloroquine for about 3-4 months). I have sjogrens syndrome. Could this be part of it.

I am worried.