By Lauren Snitzer, MD, U.S. Dermatology Partners (see bio below) If you’ve already been diagnosed with eczema, how do you know when it’s time to go back to the dermatologist for eczema care? You’re already painfully familiar with the uncomfortable symptoms of eczema: red, itchy, cracked, blistered and inflamed skin. For some, flare-ups occur sporadically and…