Psychodynamic model of disease explains the psychopathologic cause of all mental illness to be

Unconscious conflict The classic view of the genesis of neuroses, regards conflicts as essential. The conflict may arise between instinctual desire and external reality. Moreover because the conflict has not worked through to a realistic solution, the desirous wishes that seek discharge have been expelled from consciousness through repression or another defence mechanism. The unconscious tendencies then fight their way back into consciousness. According to Freud neurotic symptoms develop as a result of the failure of repression.