Haemophilia: definition, symptoms, diagnosis and treatments
What is haemophilia?
Haemophilia is a rare genetic bleeding disorder that affects the blood’s ability to clot properly. In people with haemophilia, the blood takes much longer than normal to clot after an injury, which can lead to prolonged or spontaneous bleeding.
This condition occurs because of a deficiency in certain clotting factors, proteins in the blood that are essential for the normal clotting process. When these factors are missing or present in insufficient amounts, the body cannot form stable blood clots effectively.
In most cases, haemophilia is an inherited genetic condition linked to the X chromosome. Because males have only one X chromosome, they are more likely to develop the disease if they inherit the mutated gene. Females usually have two X chromosomes and are therefore more often carriers of the gene, although some may experience mild symptoms.
Although haemophilia is a lifelong condition, medical advances have significantly improved treatment and quality of life. With proper care and modern therapies, many people living with haemophilia can lead active and fulfilling lives.
What are the symptoms of haemophilia?
The symptoms of haemophilia vary depending on the severity of the clotting factor deficiency. Some individuals have mild forms of the disorder and experience bleeding only after surgery or injury, while others may have severe forms with frequent bleeding episodes.
The most characteristic sign of haemophilia is unusual or prolonged bleeding.
Common symptoms include:
- prolonged bleeding after cuts, injuries, surgery, or dental procedures
- frequent or unexplained bruising
- bleeding into joints, known as haemarthrosis, which causes pain and swelling
- bleeding into muscles
- frequent nosebleeds
- excessive bleeding in infants after medical procedures or vaccinations
In severe cases, bleeding may occur spontaneously without any obvious injury. Joints such as the knees, ankles, and elbows are particularly vulnerable.
Over time, repeated bleeding into joints can lead to chronic joint damage, known as haemophilic arthropathy.
What causes haemophilia?
Haemophilia is primarily a genetic disorder caused by mutations in genes responsible for producing clotting factors.
These genes are located on the X chromosome. Since males have only one X chromosome, inheriting the mutated gene leads to the development of haemophilia. Females, who have two X chromosomes, are usually carriers of the gene and may pass it on to their children.
In some cases, haemophilia may develop without any family history, due to a spontaneous genetic mutation.
There is also a condition known as acquired haemophilia, which is different from inherited haemophilia. In this case, the immune system produces antibodies that interfere with clotting factors and disrupt the normal clotting process.
How is haemophilia diagnosed?
Haemophilia is diagnosed through specific blood tests that evaluate how well the blood clots.
When unusual or prolonged bleeding is suspected, doctors may order laboratory tests to measure the activity of clotting factors.
Diagnosis typically includes:
- blood clotting tests
- measurement of factor VIII and factor IX levels
- genetic testing to identify the mutation responsible for the condition
In families with a known history of haemophilia, screening can sometimes be performed before birth or early in life.
Early diagnosis is important because it allows healthcare professionals to start appropriate treatment and prevent complications related to repeated bleeding episodes.
What treatments are available for haemophilia?
Although there is currently no definitive cure for haemophilia, modern treatments can effectively prevent and control bleeding episodes.
Treatment usually involves replacing the missing clotting factors through intravenous injections.
Two main treatment strategies are used.
On-demand treatment
Clotting factor replacement is administered when a bleeding episode occurs, helping to stop the bleeding and prevent complications.
Preventive treatment (prophylaxis)
Preventive treatment, also known as prophylaxis, involves regular infusions of clotting factor concentrates in order to prevent bleeding episodes from occurring.
Recent medical advances have introduced new therapeutic options, including:
- extended half-life clotting factors, which reduce the frequency of injections
- bispecific antibodies that mimic the activity of clotting factors
- gene therapy, an innovative approach currently being developed to address the genetic cause of haemophilia
These advances have significantly improved the outlook for people living with haemophilia.
What complications can occur?
If haemophilia is not properly managed, repeated bleeding episodes can lead to several complications.
The most common complications affect the joints, due to recurrent haemarthrosis that may cause chronic pain, stiffness, and reduced mobility.
Other potential complications include:
- severe muscle bleeding
- internal bleeding
- in rare cases, life-threatening bleeding in the brain
However, with appropriate treatment and regular medical follow-up, the risk of serious complications can be greatly reduced.
Can people live a normal life with haemophilia?
Thanks to advances in treatment and specialised care, many people with haemophilia can lead active and relatively normal lives.
Managing haemophilia effectively usually involves:
- regular follow-up in specialised haemophilia treatment centres
- learning how to recognise and manage bleeding episodes
- engaging in appropriate physical activity to strengthen muscles and protect joints
- developing a good understanding of the condition
Patient education plays an essential role in helping individuals and their families better understand the disease and reduce the risk of complications.
Types of haemophilia
The term “haemophilia” refers to several bleeding disorders caused by deficiencies in different clotting factors.
Haemophilia A
Haemophilia A is the most common form of haemophilia, caused by a deficiency in clotting factor VIII. It accounts for approximately 80–85% of all cases.
Haemophilia B
Haemophilia B is caused by a deficiency in factor IX and is sometimes referred to as Christmas disease.
Haemophilia C
This rarer form involves a deficiency in factor XI and generally causes milder bleeding symptoms.
Acquired haemophilia
Unlike inherited haemophilia, acquired haemophilia occurs when the immune system produces antibodies that interfere with clotting factors.
When should you see a doctor?
Certain symptoms may suggest a bleeding disorder such as haemophilia. It is recommended to consult a healthcare professional if you experience unusual or prolonged bleeding.
Medical advice should be sought in the following situations:
- bleeding that lasts longer than normal after injuries or dental procedures
- frequent bruising without an obvious cause
- repeated bleeding into joints or muscles
- a family history of haemophilia or bleeding disorders
In infants and young children, warning signs may include significant bruising during early walking stages or unusual bleeding after medical procedures.
Early diagnosis helps ensure timely treatment and reduces the risk of complications.
Living with haemophilia
Living with haemophilia often means adapting certain daily habits to reduce the risk of bleeding. With proper treatment and medical supervision, many individuals with haemophilia are able to maintain an active lifestyle.
Management of haemophilia generally includes:
- regular follow-up in specialised treatment centres
- learning how to manage bleeding episodes and treatments
- practising safe physical activities that help strengthen muscles and protect joints
- taking precautions to avoid injuries whenever possible
Beyond medical care, support from other patients and communities can be extremely valuable. Sharing experiences with others living with haemophilia may help people better understand the condition, find practical advice, and feel less isolated when coping with a rare disease.
FAQ about haemophilia
Is haemophilia hereditary?
In most cases, haemophilia is a genetic condition inherited from a carrier mother who carries the gene responsible for the disorder.
Is there a cure for haemophilia?
There is currently no definitive cure for most forms of haemophilia. However, modern treatments allow patients to prevent and control bleeding episodes effectively.
Can women have haemophilia?
Yes, although it is rare. Women are usually carriers of the gene but may sometimes experience mild symptoms.
What is the life expectancy of someone with haemophilia?
With proper treatment and medical care, life expectancy for people with haemophilia is now close to that of the general population.
Can people with haemophilia play sports?
Yes, certain physical activities are encouraged because they help strengthen muscles and protect joints. However, high-impact or contact sports may need to be avoided.
