Section: Brain & Nervous System
Hallucinations
Also known as: Seeing things, Hearing voices
Hallucinations symptom guide: what it can mean, possible causes, and when to seek care. Educational only.
Overview
Hallucinations can come from mental illness, medicines, high fever, or severe sleep loss. They are a symptom—not a moral failing. Safety and prompt assessment matter.
Possible causes
- Mental health conditions
- Medicines or substances
- High fever
- Severe sleep loss
- Neurological problems
When to see a doctor
Seek urgent help for hallucinations, especially with risk of self-harm.
Related conditions
Sources
This guide is put together from these references.