Hemophilia is a group of hereditary deficiencies of blood clotting factors VIII, IX, or Ⅺ, known as hemophilia A, B, and C, respectively, with hemophilia A being more common. Hemophilia does not have a direct impact on the patient’s life expectancy, if bleeding is caused by accidents, trauma or other diseases, and the bleeding is not stopped in time, it may affect the patient’s health or life expectancy; if prevention is done in general, or timely treatment is given when bleeding occurs due to injuries, it does not have much impact on the patient’s life expectancy, and the patient can live as a normal person.