Does pink eye cause a scratching sensation against your eyeball? it feels like something is constantly scratching it and is so uncomfortable

Yes: The scratching feeling represents involvement of the cornea in the infection. Your doctor will typically patch the eye for comfort. He/she may add antibiotic drops and/or a dilator as well. You'll feel better within 3 days.

Foreign body: You may have a piece of something that is still in your eye tissues or that object may have cut your eyeball. Go to the doctor and get a proper answer ... Now!