ME/CFS is a multi-system disease
Not only do symptoms vary in type but also in severity, ranging from mild to severe. An estimated one in four patients are housebound or bed bound and many of the most severely affected need to be fed by tube.
There are over 60 symptoms reported by people with ME/CFS. The common symptoms are listed but not limited to what may define an individual experience.
Currently, there is no laboratory diagnostic test. Due to a symptom set that overlaps with several other diseases, clinical assessment and symptoms and the exclusion of other diseases are necessary for accurate diagnosis.