My dog's eye bump burst, but it's still irritated. Should I see a vet?

Hello and welcome to Petco Pet Education Center, formerly Petcoach. Bumps on eye-lids can be cysts, but they can also be other masses like tumors. For this reason getting it checked is recommended. In the mean-time, I would check for squinting, moving away from your hand when you go to pet him on that side of the face, redness/blueness/whiteness of the eye-ball itself that is different from the other eye, or scratching/pawing at the eye. If any of these are occuring, then I would take Marley to a vet. If he isn't too concerned about it, and isn't squinting or moving away from you, and is only minimally pawing at it, then I would recommend getting an E-collar (you can pick one up from any emergency clinic without an appointment as it is now late in Australia), to prevent ongoing trauma to the eye which can get much much worse with scratching. I would then get Marley to your vet in the morning. Best of luck with Marley.