That's all good news. My utter layman's medical diagnosis points to just a over sensitive autoimmune segment from plant life. In short, your autoimmune system is overreacting to some contact substance?
It boils down to you being you with your environment. What effects you may not even make someone else blink.
Good news that it's nothing serious but it sounds just like my prognosis, You're On Your Own! Moisturizer is what they told me to do also. There was a trigger that set off whatever you're experiencing now because there's always a trigger. Unless you get lucky like newmedman did who was able to figure out what he was allergic to so he was able to fix it by himself. I think what you and I experienced is way more common and frustrating among people who suddenly break out in an undiagnosed crazy itchy rash and doctors don't have a magic pill to cure us or understand why it happened.
Well. I'm glad your diagnosis wasn't alarming. Eczema can be dealt with. Just be sure to continue to use the lotion, even after it goes away. Dry skin gets itchy.