Can certain diseases cause paranoia similar to that seen in individuals with paranoid schizophrenia, even if they do not have the disorder?
Last Updated: 28.06.2025 08:59

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