Prader-Willi syndrome

Find out about Prader-Willi syndrome (PWS), which is a rare genetic condition that causes a wide range of physical symptoms, learning difficulties and behavioural challenges.

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This NHS content is written for people in England. Services, entitlements and contact routes may differ in other countries.

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Content supplied by the NHS website, refreshed 19 August 2026. View the original NHS article ↗

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