Neurosis

Neurosis is a class of mental disorders involving distress but not delusions or hallucinations. The person's behavior is not outside socially acceptable norms. It is also known as psychoneurosis or neurotic disorder, and those suffering from it are said to be neurotic. The term "neurosis" was coined by Scottish doctor William Cullen in 1769. 
The American Diagnostic and Statistical Manual of Mental Disorders (DSM) has eliminated the category of "neurosis". The editors decided to provide descriptions of behavior instead. According to The American Heritage Medical Dictionary, it is "no longer used in psychiatric diagnosis". Instead, the disorders once classified as neuroses are now considered anxiety disorders. These changes are controversial.
Neurosis may involve:
"Neurosis" has also been defined simply as a "poor ability to adapt to one's environment, an inability to change one's life patterns, and the inability to develop a richer, more complex, more satisfying personality."