Since last 20-25 days, she is experiencing mild dry cough only while speaking and she doesn't have any other cold symptoms like runny nose or wet cough or fever or headache or watery eyes etc etc...and for that mild dry cough she is not taking any medicines thinking that mild dry cough while speaking will subside on its own in due course. Also, she is not experiencing any acidity or anything such that....So just want to know what could be the cause of it??? Any treatment is needed for that??? Thank you