small little bubbles on the upper eyelid that is on the edge of the eyelid that scrapes the surface of my left eye whenever i blink. size is almost 1mm in diameter, almost skin color approaching clear even. there are 2 on the left. 4 days ago there appeared to be a bit of discoloration on the upper eyelid, purple, itchy, painful to rub eye, in the region of the tear duct but on the upper eyelid.