I smoke ,, and have been for several years now. And just now, I was smoking , my throat started to bleed and I was spitting up blood, I can feel it in my throat, like a sore. The bleeding only left a small amount of blood in my salivia, out of about the 10 times I spit, I saw blood in probably about 6 times out of 10. It has stopped but I am wondering if this could be a sign of throat cancer or something like that?