Telangiectasia or spider veins as some people call them are small dilated blood vessels near surface of the skin. 90 -95% of people with hht will develop telangiectasia. Telangiectasia's can develop anywhere on the body but most commonly seen on face, mouth and hands these at times can bleed treatments are available it is best to talk to your GP or consultants about treament options. About 80% of people with hht will develop telangiectasia in their stomach and / or gastrointestinal system but only about 20% will have bleeding which can range from mild to severe. As a person with hht gets older telangiectasia's will become more apparent.