Thanks for choosing HCM,
the condition you have described is most probably HIDRADINITIS SUPPURATIVA .This is a chronic condition with recurrent on and off acute attacks leads to scarring also.you should be biopsied from your armpit .Meanwhile start tab metronidazole
400mg tid along with tab erythromycin500mg bid for 15 days.
Also apply Fucidic acid cream twice daily.
Let me know after 2 weeks .bye for now.