what are the causes of post nasal drip
Post-nasal drip is the sensation of mucus accumulating or dripping in the back of your throat. Post-nasal drip can irritate your throat, causing a sore throat or cough. It can go along with a stuffy nose if you have a nasal allergy.It is more likely to be caused by the mucus becoming too thick or by irritation of your throat. In my experience, the three most common causes are allergy, gastric reflux, and medications that cause dryness.â. Here are some other common conditions that may cause post-nasal drip: 1  Cold or flu viruses. 2  Sinus infection.