Two days back I woke up in the morning with the feeling that there was an eyelash in my eye. I checked in the mirror and saw that there were two tiny bubbles that looked clear and completely painless on the rims of my eyelid. They were on the upper as well as lower eyelid. I washed my eyes thrice that day and went to sleep. The next morning they had vanished and new ones had come next to them. I have attached photos. They sometimes feel slightly itchy. Kindly advise!