Hereditary haemorrhagic telangiectasia (HHT) is an inherited genetic disorder that affects the blood vessels. It's sometimes spelt hereditary hemorrhagic telangiectasia and is also known as Osler-Weber-Rendu syndrome .

Typical symptoms are persistent Nosebleed and visible red spots in certain places on the body typically on the fingertip pads, on the lips and tongue, and on mucous membranes such as the lining of the nose and gut (see What are the symptoms? ).

Itaffectsabout 1 in 5,000 people.

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Medically Reviewed by a doctor on 8 Jun 2016