Delusions

Also known as: False fixed beliefs

Delusions symptom guide: what it can mean, possible causes, and when to seek care. Educational only.

Overview

Delusions can appear in mental illness, after medicines, or during high fever. They are not a character flaw—they are a symptom needing professional assessment. Safety for the person and those around them comes first.

Possible causes

Mental health conditions
Medicines or substances
High fever or infection
Severe sleep loss
Neurological problems

When to see a doctor

Seek urgent help if someone has delusions, especially with risk of self-harm or harming others.