Your sinuses are huge cavties in the head.  Some of them may or may not be full
of fluid and infection.    A CT scan will show if that is the case.  

Turbinate reductions are just minor surgery in the hope of improving air flow,
and may or may not help open up the sinuses.

No the turbinate is a large baffle that does not contain a cavity.  It  can
block the drainage from the sinuses though.

Well it may be blocking the sinus drainage.

Have you had a CT scan done?

This may not apply to you, but have you been tested for food allergies?

After many medical tests and many specialist doctors, all of whom had no
explanation for my many symptoms, the only thing that was known to be
wrong with me was I had significant inhalant allergies.  I asked my
allergist to test me for food allergies.  On the skin test, there was a
very mild reaction to barley, which was enough to order a blood test.  And
on that blood test I learned I had significant & broad food allergies, the
worst being corn, but also including wheat & barley & rye & oats & rice &
peanuts & many fruits and vegetables.

Now, corn is used in the U.S. in almost every product you buy in the
grocery store, including such ubiquitous things as iodized salt.  It
appears most often as corn syrup (for sweetener) or starch, but there are
more than a hundred other common ingredients that are derived from corn
(see http://www.cornallergens.com/list.htm).  

Once I began eliminating corn from my diet, more than two dozen of my
decade-long chronic symptoms disappeared.  That includes excessive daytime
sleepiness (my sleep doctor thought I had narcolepsy, but two sleep studies
didn't confirm that);  I discovered recently that I wasn't sleepy during
the day when I tried Advair (an asthma inhaler) which seems to indicate
lung inflammation somehow interfering with my breathing at night.  I know
when I accidently eat corn now because I feel my turbinates swell, I get
sleepy, and I get a post-nasal drip -- it was only after I stopped eating
corn that I realized my turbinates had been swollen my whole life and that
post-nasal drip I got after eating was finally explained.  My digestive
problems disappeared, my skin cleared up, and I suddenly felt hungry again
after years of not being hungry.

To make matters worse, corn also appears in many prescription drugs, even
the allergy drugs I've been taking.  Just today I learned that Rhinocort
is made with either a wheat dextrose or a corn dextrose, and that explains
the recent swelling of my turbinates -- I'd been lucky so far, apparently
getting the wheat bottle instead of the corn bottle, but they can't
guarantee which ingredient is in which bottle so I'm going to have to stop
using it entirely.

But I apparently have a pretty unusual allergic reaction to food, my
allergist tells me.  Had it been more obvious, I would have seen an
allergist 15 years ago instead of last year (I'm 33) and would possibly
not have needed sinus surgery this year.

Something for you to rule out, given how miserable you must be.

Post nasal drip is essentially the mucus is too thick becasuse  the cilia don't
move the mucus out properly.
Number one is to increase the amount of hot tea/lemon you are taking . Number
two is to moisten the bedroom - best is simple evaporation by pans of water.  
If that doesn't do it, ask your doctor about pulsatile irrigaition to thin the
mucus and help restore cilia action.
Murray Grossan, M.D.
http://www.ent-consult.com

i don't see how turbinate surgery could reduce post-nasal drip. (Did your
ENT promise that it would?) In fact, I think I have had more PND since my
sinus and nasal surgeries.

The turbinate surgery is supposed to open up the nasal passages so that you
can breathe better through them. It has nothing to do with phlegm draining
from the sinuses into the throat.

Hello, 5438,
The drip may be coming from your ears. Mix a solution of half peroxide
and half alcohol and with a dropper, carefully drop a dropperfull it
into each ear. If you hear a lot of hissing you have ear-fungus
infection. You also have fungus infection in your sinuses. The solution
of peroxide and alcohol wil get rid of the ear fungus, however you will
need something as Diflucan for the sinuses. Sorry i didnot see your
original post until now.

I have the same symptoms and have had four rhinoplasties.   After the
last surgery, I was allergy tested again (negative of course) and was
told that the only diagnosis for this problem was vasomotor rhinitis.
Thus far, I have been using Atrovent and Astelin with limited success
and was told that there is nothing that can be done about it.  After
doing some searching on the internet, I found information in several
Journals, i.e., Journal Laryngol Otol. 1980 Dec;94(12):1411-3 and
others published later which suggest that cryosurgery (liquid nitrogen)
can help reduce this  fluid flow because it affects both the mucosa and
the submucosa.  Some report success rates as high as 54% and others
suggest that further study might be necessary.  I would like to know
more from a doctor who has actually performed the procedure because I'm
thinking of having it done if it might help solve this problem.