I went to a doctor at Kaiser when I was sick with coughing, phlegm, and other symptoms. Here is what he said about feel like you have phlegm when you really don't.
If you yell at a concert or party or singing, you will notice that people clear there throats. They really have nothing in their throats but since we all swallow, sometimes we can bring something up and that something is saliva. This same thing happens when we have post nasal drip or coughing due to illness.
The yelling, singing, coughing, post nasal drip, etc. done to our vocal cords inflame them. This happens due to over use or "abuse" which makes them touch each other, giving us the feeling that something is on them. Inflammation. It is our brains natural reaction to either cough or "clear our throats" when the vocal cords are inflammed.
When you have an actual illness, yes, there is a reason for feeling like something is in your throat, because something is. After your illness has subsided, we still feel the urge to clear our throats or cough because all of that coughing has inflamed the vocal cords.
Basically you can see how inflammation is the cause of the prolonged feeling that you "need" to cough or clear your throat once the illness has subsided.
You can take all of the medications in the world to numb your throat, but this only tricks your throat for a while, and then all of a sudden you are back where you started until it FINALLY goes away. This is also the revolving cause of some cases of chronic coughing.
Ok so now to the good stuff, the resolution!
ANSWER: IBU 800 or 800mg of IBUPROFEN
REASON: ibuprofen gets rid of the "swelling" also commonly know as inflammation! TADA
The doctor also told me that I can take up to 2000MG(two thousand) of IBUPROFEN in a 24 hour period but NO MORE THAN THAT.
I am not a doctor, nor claim that my situation can resolve another persons medical condition. This did, and continues to help me when I have the issue as described above. With ANY advice, always make sure to get a second opinion from your doctor or nurse hotline.
I hope this helps!!