My eye is really red and feels bruised with discharge. at what point do i ned to see a doctor?

Many things: Red eyes can come from inflammation with chronic allergies, dry eye syndrome, blepharitis (minor infection of the eyelid margin), meibomianitis (blocked ducts on eyelid margin. In addition, you may have inflammation on the top of the eye, episcleritis or scleritis or in the front to the eye, irtis. You need the right diagnosis to get the treatment to get rid of red eyes. You need an eye exam.