When was asthma first discovered?

While asthma-like symptoms were described as far back as ancient Egypt around 1500 B.C., asthma was first defined as a term around 400 B.C. by the Hippocratic authors of Con, ancient Greece. Some authors give full credit for defining the term asthma for the medical community to Hippocrates, although most experts now believe there were many authors. He did not define asthma the way we do today. Instead, he defined it as a symptoms of shortness of breath. Gradually, since that time, asthma was slowly morphed into what it is today, with all the other ailments that cause shortness of breath (kidneys, heart, common cold, croup, etc.) being extricated from the rubric term asthma to become disease entities of their own. Asthma was proven to be a disease of spasms of the lungs by Charles J. B. Williams in 1840, with various physicians over the next 100 years confirming this theory. It wasn't until the 1990s that asthma was found to be a disease of chronic inflammation of the air passages.