For past five years, always in the spring, I have developed a consistent, irritating dry cough. I have been tested three times for allergies across that time and the results have always showed that I have no allergies.
I've been tested for allergies multiple times across the past few years and always the tests come up negative. Yet I have consistent problems with dry, asthma like -- and sometimes nearly uncontrollable -- coughing every spring, including this spring.