Have you ever had a dry, tickly, chronic cough that lasted longer than a month? What do you think caused it? If you have ruled out any medical causes or allergies, consider that you might be straining to be heard.
Feeling heard is one of the biggest issues many of us deal with and if we don't feel heard it can manifest in different ways. Louise Hay, in You Can Heal Your Life, says coughing is a desire to bark at the world: “See me! Listen to me!”.
Rate how true her phrase feels when you say it out loud, 10 being true and 0 being false: “I am noticed and appreciated in the most positive ways. I am loved”, if you have any tailenders or objections to this statement you can start tapping on them.