2. Environmental Irritants
There are lots of environmental irritants that can cause you to have a dry cough. One of the most common examples is secondhand smoke. People that smoke cigarettes will develop a cough after a few years of smoking, but people that breathe in cigarette smoke may also react badly to it. This is usually fairly easy to identify because you know whether or not you are surrounded by smokers and whether this could be a potential cause for your dry cough.
But it is not just cigarette smoke that can cause a reaction in the lungs. You may also be reacting to pollution in the air, someone’s really strong perfume or various other irritants that you have not considered. You will have to use your detective skills and figure out whether there is something around you that could be causing your cough so that you can eliminate it.