Mental Health
Definition according to WHO;
A State of well-being in which individual realizes his or her own abilities, can cope with the normal stresses in life, can work productively and fruitfully, and is able to make a contribution to his or her community.
Classification
                     Mental Illness
1. Psychosis            Neurosis                 Others
2. Schizophrenia        Depression                    Alcoholism
3. Psychosis               Phobic Anxiety             Dementia
4. BPAD                    Other Anxiety               MR
i. OCD                            
ii. Conversion Disorder
5. Epilepsy, Migraine
What is MENTAL DISORDER
  "Disorder" is not an exact term, but it is used here to imply the existence of a clinically recognizable set of symptoms or behaviour associated in most cases with distress and with interference with personal functions.
  Personal Functions :Social and Occupational
  Social deviance or conflict alone, without personal dysfunction, should not be included in mental disorder as defined here.
  Eg
Classification of Mental Illness
a. ICD 10
b. DSM 5
ICD 10 Classification
a. F00-F09:  Organic, including symptomatic, mental disorders
b. F10--F19: Mental and behavioural disorders due to psychoactive substance use
c. F20-F29: Schizophrenia, schizotypal and delusional disorders
d. F30-F39: Mood [affective] disorders: Mania and Depression
e. F40-F48: Neurotic, stress-related and somatoform disorders
f. F50-F59: Behavioural syndromes associated with physiological disturbances and physical factors:
g. Sleep disorder, sexual disorder, eating disorder
h. F60-F69:Disorders of adult personality and behaviour
i. F70-F79: Mental retardation
j. F80-F89: Disorders of psychological development
k. F90-F98: Behavioural and emotional disorders with onset usually occurring in childhood and adolescence
Causes of Mental Illness
1. BIO
2. Psycho
3. Social