Winter can do a real number on your skin. Between the cold, dry air outside and the hot, dry air inside, your skin can resemble the Sahara by the time it’s over. The mild days of spring have probably already brought some relief, so now’s the time to seize the day and finish the job. To help your skin stay healthy this spring, follow these 7 tips for everyone — plus a bonus tip for folks with varicose veins. 1….