Hello,
Thanks for posting your query at DoctorSpring.com. I can understand your concern.
This seems to be really infected right now. You need to take an oral antibiotic like azithromycin for it.
Application of mupirocin cream twice a day will be helpful.
Once the infection settles down, you could send me a pic so I can see the actual lesion which got infected.
Please let me know if you have any queries.
Take care