Disgust
Disgust is the emotion that expresses a reaction to things that are considered dirty, revolting, contagious, contaminated, and inedible. It is divided into two categories: physical disgust and moral disgust. Disgust is associated with a distinct facial expression and a drop in heart rate.
The origins of disgust are traced to the natural selection process, which humans instinctively acquired to avoid food poisoning, threat, and infection. With time, disgust evolved into a common response to tasting, smelling, touching, seeing, and imagining unfavorable objects. Waste products, decomposing flesh, and insects are among the things that commonly disgust people.
Disgust can be instinctual or socially taught. According to research, women and children are more prone to experiencing disgust than men. Functional MRI tests show that the anterior insula in the brain reacts when an individual is disgusted. Some scientists believe that disgust is based on prejudices. They think that these prejudices should be questioned, rather than accepted.
Updated, sourced overview
The text above is preserved from the original listofhumanemotions.com article. The overview below adds current, sourced context.
Disgust is a basic human emotion triggered by things perceived as contaminated, offensive, or inedible. It manifests across two main forms: physical disgust, which arises in response to rot, waste, bodily fluids, or signs of infection, and moral disgust, which is provoked by actions or behaviors regarded as repugnant or ethically wrong. The distinction reflects the two pathways through which the emotion operates, though both serve protective functions rooted in human survival.
The evolutionary origins of disgust lie primarily in avoidance of food poisoning and disease transmission. Early humans who felt strong aversion to spoiled food or infected materials were more likely to survive and reproduce, embedding this response deep in the nervous system. Over time, the emotion generalized beyond these core threats to encompass a much broader range of triggers, from certain textures and odors to social and moral transgressions. This expansion allows disgust to regulate behavior across taste, smell, touch, and sight.
Disgust has a recognizable physiological signature. The characteristic facial expression—a wrinkled nose and raised upper lip—is consistent across cultures and communicates the emotion to others. Brain-imaging research has identified the anterior insula as a key region involved in processing disgust. Like other emotions, disgust is not entirely fixed by biology; culture, learning, and personal experience shape what specific stimuli provoke the response and how intensely individuals react to them. Understanding disgust as a normal emotion with both innate and learned components provides insight into why people respond differently to the same triggers.
This page updates and expands an original listofhumanemotions.com article with current, sourced information.
Sources: Paul Ekman Group — Universal Emotions; American Psychological Association — APA Dictionary: emotion. Educational information only — not medical or psychological advice. See our sources & fact-check policy.
Frequently asked questions
What is disgust?
Disgust is the basic emotion provoked by things judged contaminated, offensive, or inedible. It is usually divided into physical disgust (toward rot, waste, or infection risk) and moral disgust (toward acts seen as repugnant). Its…
What triggers disgust?
Disgust is typically triggered by contamination, rot, bodily waste, moral violation.
How is disgust expressed?
Disgust is commonly shown through wrinkled nose, raised upper lip, narrowed eyes.
Is it one of the basic emotions?
Yes — disgust is one of the six basic emotions identified by psychologist Paul Ekman (happiness, sadness, anger, fear, disgust, and surprise).
More basic emotions
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