What is going on? Popped blood vessels on breast

Difficult to say without a proper exam but I would say it is either the skin reacting and stretching from having larger implants put pressure on it which would resolve over time (a vascular issue) or you could have cellulitis like the emergency room doctor states.Either way I would follow up with your plastic surgeon and be evaluated rather soon if not urgently.Hope that helps.

could be developing due to the immense stretch on your skin.  If infection has been ruled out and there are no dermatological disorders that are obvious, I would speculate you hare going to have a lot of stretch marks.