Yes, it can be due to reflux. Throat, and breathing issues are frequently unknown symptoms of reflux. For years, I had a very mild cough, & frequent throat clearing. I also got laryngitis often. The worst it ever was was the year before I started taking reflux meds. I had laryngitis three times that year. For me the laryngitis always started with a cold but the cough and lost voice would linger. Then I got "true" reflux symptoms and started on meds. I haven't gotten laryngitis since then and though I of course occasionally get a cough when I have a cold the chronic cough/throat clearing are gone.
My 10 year old also had a chronic cough that we were treating unsuccessfully as asthma. I started her back on Prevacid and it went away. She is now maintained on Zantac but a cold will set her back to coughing and we need to then treat her with Prevacid again before getting her back down to Zantac.
Good Luck - Stephanie
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I meant to give you the link to the reflux symptoms in my last post.