Hi. Thanks for posting your concern at HCM I would advice that you keep it open as it seems to be infected and covering it with band aid would prevent drainage of pus and infected secretions. In such a case i would advice that you apply a topical antibacterial cream like mupirocin twice daily for a week. An empirical oral antibacterial from the penicillin group, till you come up with the appointment, would help control the infection. I would have also liked to do a pus culture/sensitivity from the lesion for future specific antibiotic therapy if required. take care regards