Mental health conditions: Medical conditions related to mental health, emotions, behavior, personality, psychology, psychiatry, and so on.
Paranoia: Delusion that people or events conspire against you.
Psychological addiction: Psychological addiction refers to the lack of willpower in fighting against a compulsive need for something i.e. a mental dependence rather than a physical dependence. The addiction stems from psychological or emotional factors. Psychological addictions may involve addictions to drugs, sex, shopping and just about anything else. A person finds themselves unable to resist the source of their addiction.