Causes of persistent cough include post-nasal drip, acid reflux, blood pressure medications, and infections like pertussis.

Can allergies make you cough, or is there something else to blame for that seemingly seasonal tickle in your throat? An allergist explains.

Post nasal drip is basically just mucus. So with spring allergies you tend to notice-- basically, it's your body's reaction to something foreign. So when you produce a little too much mucus then ...

Dr. Duffy says asthma, reflux, post-nasal drip, and drugs like ACE inhibitors for blood pressure, cause the most coughs. GERD, or reflux, can cause coughing, although coughing can also cause GERD.

But in January, she came into the office, unable to shake a chronic, hacking cough for ... prescription nasal steroid sprays or oral antihistamines help minimize postnasal drip.

So the most common symptoms you're going to see are the itchy, irritated throat and then that dry cough that's just ... in the area and to stop the post nasal drip. And then there are some ...