Persistent Cough

One of the most common triggers for a cough is mucus draining down the back of the throat, called post-nasal drip.

Allergic rhinitis (also called hay fever) can cause post-nasal drip with a cough. Some people also produce clear nasal mucus with no allergy trigger, reacting to temperature change or irritants in the air. Nasal symptoms with no allergy trigger are sometimes named "vasomotor rhinitis."

Symptoms that suggest post-nasal drip as a likely cause of your cough might include:

- Frequent nose dripping or discharge

- A frequent need to clear your throat

- A feeling of liquid dripping into the back of the throat

- Nasal congestion

- Allergy symptoms such as sneezing or itchy, red eyes

Do you have any of these symptoms, which are suggestive for post-nasal drip?

Yes, I have symptoms that suggest post-nasal drip.

No, I don't have these symptoms.