Haemophilia A is a genetic disorder that affects the blood's ability to clot. It is caused by a deficiency of factor VIII, 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 disorder is inherited in an X-linked recessive pattern, meaning it primarily affects males, while females can be carriers. Symptoms can range from mild to severe, depending on the level of factor VIII in the blood. Treatment often involves regular infusions of factor VIII to help manage bleeding episodes.