There are many mental disorders that are hardly noticeable
even by friends, family members and people who know the affected person very
well. Of course, these can affect both the genders. But I have seen many many
men who are destined to live a dog’s life because of these disorders while
nobody identified their disorders even in an era when treatments to these
disorders, which would enable these people to lead very normal lives, are
available.

The link to Obsessive Compulsive Disorder is:

http://en.wikipedia.org/wiki/Obsessive-compulsive_disorder

Link
for the personality disorders is: http://en.wikipedia.org/wiki/Personality_disorders

This
link provides some information on neurosis: http://en.wikipedia.org/wiki/Neurosis

One can get the links to problems related to neurosis from
the section “Psychoanalytical account of neurosis” of
the above link.

(All links are from Wikipedia)