Distension (spelled distention in many style regimens) generally refers to an enlargement, dilation, or ballooning effect. It may refer to:

• Abdominal distension, typically a symptom of an underlying disease or dysfunction in the body, rather than an illness in its own right
• Gastric distension, bloating of the stomach when air is pumped into it, as in a medical procedure
• Distention of blood vessels under increased blood pressure; see Compliance (physiology) § Blood vessels

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• Dissension (disambiguation)

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