== Symptoms ==See also : Sinus Infections
== Causes ==
Post-nasal drip may be caused by a number of conditions or health issues, including:
*bacterial infections
*viral infections that cause the common cold
*seasonal flu
*allergies
*head injury
*use of nasal sprays
*sinusitis
*gastroesophageal reflux
If the mucus secretions associated with post-nasal drip are thin and clear, the condition is most likely caused by colds, flu, allergies, cold temperatures, exposure to bright lights, certain foods or spices, pregnancy, hormonal changes, use of certain medications (such as birth control pills and blood pressure drugs), or structural abnormalities (such as a deviated or irregular nasal septum).
If the secretions are thick, it's more likely that post-nasal drip is caused by dryness in indoor air, sinus infections, hay fever, or food allergies (especially to dairy products).
== Symptoms ==
Along with the sensation of liquid dripping from the back of your nose and into your throat, post-nasal drip may produce the following symptoms:
*a cough that tends to worsen at night
*sore throat
*ear pain
*sinus pain in the face
*swelling of tonsils or other tissues in the throat
== Home remedies ==
* Nasal Irrigation : Research suggests that nasal irrigation (a procedure that involves using a salt-water rinse to clear the nasal passages) may help reduce post-nasal drip in people with chronic sinusitis.