Rare diseases · Sign or symptom

Abnormal fear-induced behavior

HP:0100852

What it means

An abnormal fear-induced behavior includes observable actions. This behavior is characterized by abnormal responses to fear or abnormal fear levels. Examples of such behavior include avoiding fear-inducing situations.

Internal responses to fear, which are experienced by an individual and do not necessarily involve clear behavioral changes (observable actions), should be labeled with a term for fear-related cognition, such as HP:5200230.

Rare diseases that can present with this8

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Abnormal fear/anxiety-related behavior · Abnormal fear/anxiety-related behaviour

Abnormal fear-induced behavior

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This page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.