question: Hi Doc...My name is Vineet..i got a pus in upper jaw right side in oct 11.consult dr. alok agarwal in sir ganga ram hospital in new delhi.nothing come in pus test report n due medicines pus was gone.but frm nov12 it comes up frequently nd vanishes..i am veg and never got hurt in mouth.plz adv the reason.should i go for CT scan also for skull .