Can certain diseases cause paranoia similar to that seen in...

Fever

Sleep disorders

Brain Tumors

Parkinson's disease

Seizures

Narcolepsy

Migraines

⁉️sources from my experiences and internet research ⁉️

PTSD

Mental disorder

Bipolar disorder

Dementia and drug use cause paranoia. That is very common. Some of other things that can include delusions and/or hallucination can be:

Affective disorders

Dementia with Lewy bodies

Alzheimer's disease,

Alcohol

Delirium tremens

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)

Stress

Alcohol withdrawal

Head injury

Grief (yes, sadly)

Charles Bonnet syndrome

Hallucinogen use

Withdrawal from benzodiazepines

Infection

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