Haemophilia B is a genetic disorder that affects the blood's ability to clot properly. It is caused by a deficiency of factor IX, a protein essential for blood coagulation. Individuals with this condition may experience prolonged bleeding after injuries, surgeries, or even spontaneously without any apparent cause. This condition is inherited in an X-linked recessive pattern, meaning it primarily affects males, while females can be carriers. Treatment often involves regular infusions of factor IX concentrate to help manage bleeding episodes and prevent complications. Early diagnosis and proper management can significantly improve the quality of life for those affected.