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 00:12

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