I have noticed a really bad smell lately. At first I was not sure what it was, but it seems to be stemming from inside my sinuses. I can feel specfifc pressure on the left side of my nose, and under the left eye. I can also feel the pressure release in what almost feels like bubbles popping in my left sinus cavity on occasion. I know the smell is related to the sinus cavity, because the mucus from my nose has the same horrible odor. I have had sinus infections before, but nothing that has ever caused a horrible smell like this.