Best Answer - Chosen by Asker You probably have sensitive vessels and an acute sense of smell and just running your fingers across your nose, sniffing, inflammation or sneezing could cause a very small tear and bleed a tiny amount. You may smell it. It dries and it's gone. Also, it's very possible that you may have a mild sinus or ear infection. Yup! You could be having drainage in there and you are probably detecting blood, whether you smell or taste it. FORTUNATELY, It will pass and heal up on it's own, and when it does... the smell will too. Either that or it's psychological. You can also check with your ENT specialist (Ear Nose Throat)