Delusions are abnormal beliefs in the truth of some unlikely situation. Examples include paranoid delusions (paranoia) and “delusions of grandeur”. Delusions may be associated with other symptoms such as anxiety (e.g. panic, fear) or mania (e.g. euphoria, abnormal happiness). The similar-sounding terms “delirium” and “dementia” refer to ...

... More on Delusions »

   •   •   •

Summary: A belief that is pathological and is held despite evidence to the contrary. ...1,2

... More on Delusions »


Causes of delusions or delusional behavior include these general categories:

Toxic Conditions: The various toxins and drugs that may cause delusions include ...

... More Causes of Delusions »

Causes List for Delusions

Possible causes of Delusions (or similar symptoms) may include:3

... Causes List for Delusions »


Types of delusions include:

Similar Symptoms: Other similar types of symptoms that may resemble delusions include:

... More Types of Delusions »

   •   •   •


  1. [from HPO]
  2. Source: GTR (NCBI/NIH): gtr/ conditions/ CN000702/ 
  3. Source: Algorithmically Generated List

   •   •   •

Note: This site is for informational purposes only and is not medical advice. See your doctor or other qualified medical professional for all your medical needs.