Disorder is usually used for mental disabilities. Disorder is any ailment that disturbs the health of an individual. Most probably, disorders create hindrance in an individual's performance and reduce his efficiency. In the beginning, disorders seem to be ordinary but they usually grow or spread in a harmful manner in an individual Most probably, a disorder cannot be detected on time, as a result of which, a simple disorder is changed into a disability.
It can be said that a disorder disrupts the normal functioning of an individual.
Disorder can be defined as blip in the usual functioning of a person.