Hello Doc, I've been suffering from Cold & running nose from past 6 months continuously. I catch cold whenever there is a change in weather & transparent mucus comes from Left Nostril. This used to happen twice a year but the last 6 months it is persistent. When I woke up next day from sleep my left nostril gets completely blocked & I have to exert pressure to expel the mucus from nose afterwards. This puts a strain on my ears and larynx area. 1 day while expelling the mucus blood came out.