I can taste blood when I breathe. I was outside shoveling the snow after work, and half way through it, I was tasting a blood scent that had to be coming from my lungs. I know it wasn't any of my gums bleeding. All through-out the day, a guy lit up about 2 - 3 cigarettes and it causes irritation in my throat and lungs. For my job, I work out in the elements with chainsaws trimming back trees from powerlines and it's been a tough winter here. This is a sign of what? pneumonia?