I had an unprotected sex with my partner last year,few days later I had this painful lump on my face which doesn t seem like boil.it took weeks before it went down but immediately it went down anoda came out and on and on for almost 2months.after it all cleared about 6 months later it came again,I took anti-biotics n all but stay as long as d first.left and has bin cuming and goin ever since.its brings out pus and its hard till it vanishes.not like d usual boil.what could dis b?