Dear Doctors: I caught a cold and was sick for about a week. There wasn't anything unusual about it except now I have a dry cough that won't go away.
It gets triggered by cold air and gets worse at night. I was in a sauna recently, and it stopped. What's happening? How can I get rid of it?
Dear Reader: You're dealing with a condition known as a post-infectious cough. This can occur in someone recove…