I saw an ophtalmologist a year ago, he said I was allergic to an eye
cream, should use Cetaphil instead, put cortisone ointment
and prescribed Patanol drops. I followed the directions, the problem subsided, and after several weeks came back, again on the left only. In the meantime, I stayed away from any eye creams and only used Cetaphil or nothing at all. And it's been like this, off an on all the time. I did not use any eye make up at the time.