There can be different causes
1) It may be due to underline diabetes mellitus
2) this may relate to STD (Sexually transmitted disease
) as your history is not pretaining any unprotected extramarital contact.
3) It may be due to drug induced taken during fever
so rule out underline sugar and local compresses with potassium permagnate followed by (Betadine Lotion) take 1 tablet of Fluconazole
(150mg stat) along with ( 400 mg Cefixime) along with (1 gm Azithromycin
). Apply any Mosturizer 4 hourly.