Von Willebrand Disease

Overview

Von Willebrand disease is an inherited bleeding disorder that affects the blood’s ability to clot properly. It occurs when a protein called von Willebrand factor is missing, reduced, or does not work as expected. This protein helps platelets stick to damaged blood vessel walls and also carries another clotting protein that is important for normal clot formation.

People with von Willebrand disease may bleed for longer than usual after an injury, surgery, dental treatment, or childbirth. Some people have very mild symptoms and may not know they have the condition until they experience unusual bleeding. Others may have more noticeable bleeding problems from childhood.

Von Willebrand disease is usually lifelong, but with appropriate medical guidance, many people manage it well. Care is often provided by a hematologist, a doctor who specializes in blood disorders, especially when procedures, pregnancy, or significant bleeding episodes are involved.

Symptoms

Symptoms can vary widely depending on the type and severity of the condition. Some people have only occasional bleeding, while others may have frequent or prolonged bleeding episodes.

• Frequent or long-lasting nosebleeds
• Easy bruising or bruises that appear after minor bumps
• Prolonged bleeding from small cuts
• Heavy or prolonged menstrual bleeding
• Bleeding after dental procedures or surgery
• Bleeding gums, especially after brushing or dental care
• Blood in urine or stool, which should always be assessed by a doctor
• In some cases, joint or muscle bleeding, usually in more severe forms

In women, heavy menstrual bleeding may be one of the first signs. It may cause tiredness or weakness if it leads to low iron levels or anemia. Children may be evaluated after repeated nosebleeds, easy bruising, or unexpected bleeding after minor injuries.

Causes and Risk Factors

Von Willebrand disease is most often caused by changes in a gene involved in producing or regulating von Willebrand factor. These genetic changes can be passed from parents to children. The condition can affect both males and females.

There are different types of von Willebrand disease. In some types, the body makes too little von Willebrand factor. In others, the protein is present but does not function normally. A rarer, more severe form involves very low or nearly absent levels of the protein.

A family history of unusual bleeding can increase the likelihood of the condition. However, symptoms may differ among relatives, even within the same family. Some people with mild forms may not have obvious symptoms for many years.

Rarely, a person may develop a von Willebrand-like bleeding problem later in life due to another medical condition. This is not the same as the inherited form and requires careful evaluation by a specialist.

Diagnosis

Diagnosis begins with a detailed medical history, including personal bleeding symptoms, menstrual history when relevant, past surgeries or dental procedures, and family history of bleeding problems. A physical examination may also be performed.

Blood tests are needed to evaluate clotting. These may measure the amount of von Willebrand factor, how well it works, and related clotting proteins. Additional tests may assess platelet function and general blood counts. Because von Willebrand factor levels can change with stress, illness, pregnancy, inflammation, or hormonal changes, testing may need to be repeated to confirm the diagnosis.

Diagnosing von Willebrand disease can sometimes be complex. Results should be interpreted by clinicians experienced in bleeding disorders. A hematology team can also help identify the type of the disease, which is important for planning treatment and preventing complications during procedures.

Treatment Options

Treatment depends on the type of von Willebrand disease, the severity of bleeding, the person’s age and health, and whether a procedure or pregnancy is planned. Not everyone needs regular treatment. Some people only need treatment before surgery, dental work, childbirth, or during significant bleeding episodes.

Management may include medicines that help the body release stored clotting proteins, medicines that help stabilize clots, or replacement therapy containing von Willebrand factor. The choice depends on laboratory results, previous response to treatment, and the clinical situation.

For heavy menstrual bleeding, a hematologist may work together with a gynecologist to plan safe and appropriate care. Iron levels may be checked if there is concern about anemia due to ongoing blood loss.

Before any surgery, invasive procedure, or dental extraction, people with known or suspected von Willebrand disease should inform their healthcare team. A bleeding prevention plan may be arranged in advance. It is also important to tell doctors about the condition before starting any new treatment, because some medicines and supplements can increase bleeding risk.

People with the condition may be advised to carry medical information about their bleeding disorder, especially when traveling or in case of emergencies. Regular follow-up helps ensure that treatment plans remain appropriate over time.

When to See a Doctor

Medical assessment is recommended if you or your child has frequent nosebleeds, easy bruising, prolonged bleeding from cuts, heavy menstrual bleeding, or unexpected bleeding after dental work or surgery. Evaluation is especially important if there is a family history of a bleeding disorder.

Seek urgent medical care for bleeding that does not stop, heavy bleeding after an injury, vomiting blood, black or bloody stools, blood in the urine, severe headache after head injury, or signs of significant blood loss such as fainting, dizziness, shortness of breath, or extreme weakness.

If von Willebrand disease is known or suspected, consult a healthcare professional before planned surgery, dental procedures, pregnancy, or childbirth. Early planning with a hematology team can help reduce bleeding risks and support safer medical care.