Thanks for posting your query at DoctorSpring.com. I can understand your concern.
This seems to be a bacterial infection that you have developed in the skin around the bump.
The bump however can't be clearly seen. I request you to send another photo of the bump.
Meanwhile, I would recommend that you take a short course of an oral antibiotic for a week. This will help in resolving the bacterial infection. You will need a prescription for the antibiotic like azithromycin.
You can apply neosporin cream over it twice a day which will help in resolving the infection too.
Hope this helps, Please let me know if you have any queries.