About haemophilia B

WHAT IS HAEMOPHILIA B?

Haemophilia B is a condition present from birth that affects the ability of the blood to clot. People with haemophilia B do not have enough of a protein called clotting factor IX (factor nine) in their blood.¹ Haemophilia B is described as mild, moderate, or severe.¹

Having haemophilia B means that you are more likely to bleed from an injury. Bleeding often happens inside the body where you can’t see it, in places like the joints, muscles or soft tissue.¹

If someone has an injury externally — for example, through falling or taking a hard knock — it may lead to excessive bleeding.¹ However, bleeding can also happen for no apparent reason.¹

Most treatments for haemophilia B help to manage its symptoms, and with the right care, most people living with the condition can still lead a full and active life.¹