Is My Lip Infected? What am I supposed to do?

Well, topical medicine such as ointment, cream or gel like Bacitracin works by stopping the growth of certain bacteria. When following the doc's instruction by washing your mouth/lips and applying thin layer of Bacitracin but the wound still secretes pus, it means that you have a systemic infection. In this case you need to see your doc so that he/she will prescribe oral antibiotics.