Katie Couric is sharing her relatable battle with eczema. The star, 66, uploaded a bare-faced selfie to Instagram on Thursday, December 14, to show how the condition takes a toll on her skin. “Calling all sensitive skin sufferers! 🙋♀️ I’ve had eczema ever since I was a little girl, and as I’ve gotten older, it’s started to flare up again,” the mom-of-two explained. “I also deal with allergic contact dermatitis — safe to say, I have to be careful about what I put on my face.” “My search for treatment led me to @cherylleemdisme. Her products have really helped,” she insisted. “I asked Lee a lot…