Water discharge from nose. Specialist.

Hi, for around a year I am facing a problem of yellowish water discharge from left nose. For last 2 to month it has become very frequent, 2-3 times in a day sometimes. Even sometimes when I wake up in morning, I notice that yellowish power is accumulated at the opening of nostril. In the day when it happens, it happens so fast that I realise it when the water drop is at the end of nostril and then more drops keep coming for 5-10 min. At times when sneezing happens then  also sometime this discharge starts. Also when this happens then for sometime I also feel nose blockage. I discussed this problem with the physician in my office and he told that the nose is reddish from inside and I should consult with ENT specialist.