Hemophilia is a rare, inherited bleeding disorder in which the blood does not clot properly. This happens because the person lacks sufficient amounts of specific blood-clotting proteins, known as clotting factors.Here's some key information about Hemophilia:Cause: It's caused by a mutation or change in one of the genes that provides instructions for making the clotting factor proteins needed to form a blood clot. These genes are located on the X chromosome. Types: The two most common types are:Hemophilia A: Caused by a lack or decrease of clotting factor VIII (8). This is the most common type.Hemophilia B: Caused by a lack or decrease of clotting factor IX (9).Inheritance: Hemophilia A and B are inherited in an X-linked recessive pattern. This means they primarily affect males, who inherit the faulty gene on the X chromosome from their mother (who is usually a carrier without severe symptoms). Females can be carriers and occasionally experience mild symptoms. It can also occur spontaneously due to a new gene mutation.Symptoms: The severity varies. People with hemophilia may experience:Prolonged bleeding after injuries, surgery, or dental procedures.Spontaneous bleeding (bleeding without an obvious cause).Bleeding into joints (hemarthrosis), which can cause pain, swelling, and eventually damage.Bleeding into muscles, leading to pain and swelling.Frequent or hard-to-stop nosebleeds.Blood in urine or stool.Large or deep bruises.