I am currently suffering from post nasal drip, and am wondering about it. I have read online that peoplpeople just become stick with it, and so, does that happen often, or are most cases you see resolved? Secondly, I am not sure what s causing it. I thought it could be allergies, but it could be sinusitis. I have a fever and dry mouth. Additionally, I just had a cold, but the mucous is thick but nothing comes out when I cough. Is it common for this to continue after a cold or could it be sinusitis?