Dark circles and puffy eyes. Your guide to what causes them and what you can do about them.   Dark circles under the eyes is one of the most common things people list as a concern when they take the Harley Street Emporium skin care test. More than 25% of respondents said it was an issue for them. There many of causes for dark circles under the eyes so unfortunately there is no ‘one-size-fits-all’ fix – despite what we’re often told.   The Causes The causes can include: genetics lifestyle (too many late nights, smoking, alcohol consumption) ageing, and health…