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 12:05

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