Can certain diseases cause paranoia similar to that seen in individuals with paranoid schizophrenia, even if they do not have the disorder?
Last Updated: 29.06.2025 08:00

Parkinson's disease
Some of those things on the list are very very rare cases but I just wanted to cover everything (or almost everything).
Affective disorders
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Mental disorder
Dementia and drug use cause paranoia. That is very common. Some of other things that can include delusions and/or hallucination can be:
Alcohol withdrawal
Stress
PTSD
Sleep disorders
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Migraines
Infection
Charles Bonnet syndrome
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Brain Tumors
⁉️sources from my experiences and internet research ⁉️
Fever
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Hallucinogen use
Pharmaceutical drug (abuse or side effects)
Alzheimer's disease,
Dementia with Lewy bodies
Head injury
Withdrawal from benzodiazepines
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Narcolepsy
Grief (yes, sadly)
Alcohol
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Bipolar disorder
Delirium tremens
Seizures