Thanks for writing in to Healthcare Magic!
You are having probably a furuncle
at that site. You may be having oily skin, obesity or diabetes
which are the conditions where this problem occurs recurrently.
You must review to a physician of your locality for getting antibiotics prescribed and the ancillary treatment to attend the comorbidities. delay may lead to complications.
If you have any further query please let me know I would try to answer it for you.
Wish you a great health!