Sadly I answered your entire post and when I got to your last question, I went to retrieve this info for you:
STY
Definition
Inflammation of one or more of the sebaceous glands of the eyelids. Painful and swollen eyelids.
Cause
Toxic poison accumulation.
AND I LOST THE CUREZONE PAGE AND THUS LOST THE ENTIRE POST I ANSWERED FOR YOU....
PLEASE READ THE ENTIRE MH WAY FOLDER 2011 NEWSLETTERS AND QUESTIONS WHICH MAKES YOU READ BOOK I AND THEN E-MAIL YOU, YOU WILL BE A NEW FREE PERSON WITH THE ABILITY TO BE YOUR OWN PHYSICIAN AND YOU CAN STEP OFF THIS MEDICAL/INTERNET NIGHTMARE YOU HAVE BEEN SUCKED INTO.