I have always had very dry skin and I have been, for the most part, able to treat it with over the counter products. This year, my face has become so dry that no matter what I do, I can not treat it. It is very flaky, sore, and the texture of my face has changed. It even hurts to smile. I have really tried almost everything. I am only 25 so this is not due to menopause. I stay out of the sun and I wear sunscreen even when it is minus 40 degrees out. I know that over treating the face can make it worse, so I have been very careful not to do that.
My question is, what causes this excessive dryness? Perhaps if I knew the cause, I could begin treating the skin from the inside rather than relying on creams, treatments, and ointments.