Can post nasal drip cause the throat to swell. I've been suffering from it and it feels as if there's a lump in my throat and it's causing me difficulty in talking, breathing and even burping. Just to burp I have to force it out sometimes. I feel bloated most of the time and appetite has reduced. Can all these symptoms be due to post-nasal drip? My lungs are all normal(x-rays and spirometry are clear)