No matter what i seem to eat or drink ( both bottled and tap water, squash, pure fruit juice, lager, milk, fizzy drinks, chips, pies, pasta, veg, fresh fruit, meat, cheese, bread) i always have phlem/mucus in the back of my throat, it's like what ever i eat/drink there is always something in the ingrediants that just seems to stick to the back of my throat, no matter how much i cough/bring it up i just cannot clear my throat or get rid of it. I can even get a lump in the back of my throat, the same one you get when you are going to be sick. I'm not sure if it's just something nasal but it is a clear kind of liquid and if i sniff in hard i can bring more up.