I think anorexia, or bulimia.
severe
Your mother has a severe mental disorder.
The worst category for a disorder/disability would be profound.
Severe case of Borderline Personality Disorder
It depends how mild it is.
For individuals with dysthymic disorder, the symptoms are so severe that they may not go out in public.
Severe Depression
I think anorexia, or bulimia.
Major depressive disorder is a moderate to severe episode of depression lasting two or more weeks.
Bipolar disorder is a chemical imbalance in the brain. The symptoms of bipolar disorder are characterized by changes of mood ranging from severe depression to a manic uncontrollable high. Acute stress disorder is the result of a psychological shock that stems from severe trauma.
Major depressive disorder is a moderate to severe episode of depression lasting two or more weeks.
Chaos can be defined as a state of severe confusion and disorder.