I have ME/CFS (Myalgic Encephalomyelitis/Chronic Fatigue Syndrome). If you aren’t familiar with it, it’s something like catching the flu and then never getting better. It is not contagious but its cause is unknown. Some research is being done, but much more is needed! Millions of people around the world suffer from it, many without a diagnosis.
Here is a list of links to my posts about ME/CFS and chronic illness: