Chronic illnesses are often defined as long-term diseases that often progress in severity. They can sometimes be controlled, but rarely cured. Chronic diseases may significantly impair everyday physical and mental functions and reduce a person’s ability to perform the normal activities of daily living. These illnesses include but are not limited to:
Inflammatory Bowel Disease (Crohn’s disease, Colitis)
Some Mental Illnesses
and many others.
A more comprehensive list of chronic illnesses can be found here.

