Can certain diseases cause paranoia similar to that seen in individuals with paranoid schizophrenia, even if they do not have the disorder?
Last Updated: 02.07.2025 00:00

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