Irritability
Tendency of organisms in response to environmental change / From Wikipedia, the free encyclopedia
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"Irritable" redirects here. For the state of inflammation, see Irritation.
For broader coverage of irritability in humans, see Frustration.
Irritability is the excitatory ability that living organisms have to respond to changes in their environment. The term is used for both the physiological reaction to stimuli and for the pathological, abnormal or excessive sensitivity to stimuli.[1]
When reflecting human emotion and behavior, it is commonly defined as the tendency to react to stimuli with negative affective states (especially anger) and temper outbursts, which can be aggressive. Distressing or impairing irritability is important from a mental health perspective as a common symptom of concern and predictor of clinical outcomes.[2]