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2. Auditory hallucination - Wikipedia

   en.wikipedia.org/wiki/Auditory_hallucination

   Psychiatry. An auditory hallucination, or paracusia, [1] is a form of hallucination that involves perceiving sounds without auditory stimulus. While experiencing an auditory hallucination, the affected person hears a sound or sounds that did not come from the natural environment. A common form of auditory hallucination involves hearing one or ...

3. Caffeine-induced psychosis - Wikipedia

   en.wikipedia.org/wiki/Caffeine-induced_psychosis

   Caffeine-induced psychosis is a relatively rare phenomenon that can occur in otherwise healthy people. Overuse of caffeine may also worsen psychosis in people suffering from schizophrenia. [1] It is characterized by psychotic symptoms such as delusions, paranoia, and hallucinations. [2][3] This can happen with ingestion of high doses of ...

4. Anxiety disorder - Wikipedia

   en.wikipedia.org/wiki/Anxiety_disorder

   12% per year [ 4 ][ 7 ] Anxiety disorders are a group of mental disorders characterized by significant and uncontrollable feelings of anxiety and fear [ 2 ] such that a person's social, occupational, and personal functions are significantly impaired. [ 2 ] Anxiety may cause physical and cognitive symptoms, such as restlessness, irritability ...

5. Phantosmia - Wikipedia

   en.wikipedia.org/wiki/Phantosmia

   When hallucinations of this type do not seem to go away or when they keep coming back, it can be very upsetting and can disrupt an individual's quality of life. [2] Olfactory hallucinations can be caused by common medical conditions such as nasal infections, nasal polyps, or dental problems.

6. Stimulant psychosis - Wikipedia

   en.wikipedia.org/wiki/Stimulant_psychosis

   Stimulant psychosis is a mental disorder characterized by psychotic symptoms (such as hallucinations, paranoid ideation, delusions, disorganized thinking, grossly disorganized behaviour). It involves and typically occurs following an overdose or several day binge on psychostimulants, [1] though one study reported occurrences at regularly ...

7. Hallucination - Wikipedia

   en.wikipedia.org/wiki/Hallucination

   Antipsychotic, AAP. A hallucination is a perception in the absence of an external stimulus that has the compelling sense of reality. [4] Hallucination is a combination of two conscious states of brain: wakefulness and REM sleep. [5] They are distinguishable from several related phenomena, such as dreaming (REM sleep), which does not involve ...