Von Willebrand disease
Medically reviewed by Drugs.com. Last updated on Oct 14, 2021.
Von Willebrand disease is a lifelong bleeding disorder in which your blood doesn't clot well. People with the disease have low levels of von Willebrand factor, a protein that helps blood clot, or the protein doesn't perform as it should.
Most people with the disease are born with it, having inherited it from one or both parents. However, warning signs, such as heavy bleeding after a dental procedure, might not show up for years.
Von Willebrand disease can't be cured. But with treatment and self-care, most people with this disease can lead active lives.
Many people with von Willebrand disease don't know it because the signs are mild or absent. The most common sign of the condition is abnormal bleeding.
There are three main types of the disease. The amount of bleeding varies from one person to another, depending on the type and severity of the disease.
If you have von Willebrand disease, you might have:
- Excessive bleeding from an injury or after surgery or dental work
- Nosebleeds that don't stop within 10 minutes
- Heavy or long menstrual bleeding
- Blood in your urine or stool
- Easy bruising or lumpy bruises
Menstrual signs and symptoms may include:
- Blood clots greater than 1 inch (2.5 centimeters) in diameter in your menstrual flow
- The need to change your menstrual pad or tampon more than once an hour
- The need to use double sanitary protection for menstrual flow
- Symptoms of anemia, including tiredness, fatigue or shortness of breath
When to see a doctor
Contact your doctor if you have bleeding that lasts a long time or is hard to stop.
The usual cause of von Willebrand disease is an inherited abnormal gene that controls von Willebrand factor — a protein that plays a key role in blood clotting.
When you have low levels of this protein or it doesn't work as it should, small blood cells called platelets cannot stick together properly nor attach themselves normally to the blood vessel walls when an injury has occurred. This interferes with the clotting process and can sometimes cause uncontrolled bleeding.
Many people with von Willebrand disease also have low levels of factor VIII, another protein that helps in clotting.
Factor VIII is involved in another inherited clotting disorder called hemophilia. But unlike hemophilia, which mainly affects males, von Willebrand disease affects males and females and is usually milder.
Rarely, von Willebrand disease can develop later in life in people who didn't inherit an abnormal gene from a parent. This is known as acquired von Willebrand syndrome, and it's likely caused by an underlying medical condition.
The main risk factor for von Willebrand disease is having a family history of it. Parents pass the abnormal gene for the disease to their children. Rarely, the disease skips generations.
The disease is usually an "autosomal dominant inherited" disorder, which means you need an abnormal gene from only one parent to be affected. If you have the gene for von Willebrand disease, you have a 50% chance of transmitting this gene to your children.
The most severe form of the condition is "autosomal recessive," which means both of your parents have to pass an abnormal gene to you.
In an autosomal dominant disorder, the mutated gene is a dominant gene located on one of the nonsex chromosomes (autosomes). You need only one mutated gene to be affected by this type of disorder. A person with an autosomal dominant disorder — in this case, the father — has a 50% chance of having an affected child with one mutated gene (dominant gene) and a 50% chance of having an unaffected child with two normal genes (recessive genes).
To have an autosomal recessive disorder, you inherit two mutated genes, one from each parent. These disorders are usually passed on by two carriers. Their health is rarely affected, but they have one mutated gene (recessive gene) and one normal gene (dominant gene) for the condition. Two carriers have a 25% chance of having an unaffected child with two normal genes (left), a 50% chance of having an unaffected child who also is a carrier (middle), and a 25% chance of having an affected child with two recessive genes (right).
Rarely, von Willebrand disease can cause uncontrollable bleeding, which can be life-threatening. Other complications of von Willebrand disease can include:
- Anemia. Women who have heavy menstrual bleeding can develop iron deficiency anemia.
- Swelling and pain. This can be a result of abnormal bleeding in the joints or soft tissue.
Because von Willebrand disease is usually an inherited disorder, consider having genetic counseling if you have a family history of this condition and you're planning to have children. If you carry the defective gene for von Willebrand disease, you can pass it on to your offspring, even if you don't have symptoms.
Mild forms of von Willebrand disease can be difficult to diagnose because bleeding is common, and, for most people, doesn't indicate a disease. However, if your doctor suspects you have a bleeding disorder, he or she might refer you to a blood disorders specialist (hematologist).
To evaluate you for von Willebrand disease, your doctor will likely ask you detailed questions about your medical history and check for bruises or other signs of recent bleeding.
Your doctor will also likely recommend the following blood tests:
- Von Willebrand factor antigen. This determines the level of von Willebrand factor in your blood by measuring a particular protein.
- Von Willebrand factor activity. There are a variety of tests to measure how well the von Willebrand factor works in your clotting process.
- Factor VIII clotting activity. This shows whether you have abnormally low levels and activity of factor VIII.
- Von Willebrand factor multimers. This evaluates the structure of von Willebrand factor in your blood, its protein complexes and how its molecules break down. This information helps identify the type of von Willebrand disease you have.
The results of these tests can fluctuate in the same person over time due to factors such as stress, exercise, infection, pregnancy and medications. So you might need to repeat some tests.
If you have von Willebrand disease, your doctor might suggest that family members undergo tests to determine if this condition runs in your family.
Even though von Willebrand disease has no cure, treatment can help prevent or stop bleeding episodes. Your treatment depends on:
- The type and severity of your condition
- How you've responded to previous therapy
- Your other medications and conditions
Your doctor might suggest one or more of the following treatments to increase your von Willebrand factor, strengthen blood clots or, in women, control heavy menstrual bleeding:
Desmopressin. This medication is available as an injection (DDAVP) or nasal spray (Minirin) It's a synthetic hormone that controls bleeding by stimulating your body to release more of the von Willebrand factor stored in the lining of your blood vessels.
Many doctors consider DDAVP the first treatment for managing von Willebrand disease. Some women use the nasal spray at the beginning of their menstrual periods to control excessive bleeding. It can also be effective when used before a minor surgical procedure.
Replacement therapies. These include infusions of concentrated blood-clotting factors containing von Willebrand factor and factor VIII. Your doctor might recommend them if DDAVP isn't an option for you or was ineffective.
Another replacement therapy approved by the FDA for treating adults 18 and older is a genetically engineered (recombinant) von Willebrand factor product. Because recombinant factor is made without plasma, it can reduce the risk of a viral infection or allergic reaction.
- Oral contraceptives. For women, these can be useful for controlling heavy bleeding during menstrual periods. The estrogen hormones in birth control pills can boost von Willebrand factor and factor VIII activity. This effect is likely available with birth control patches, though further study is needed to confirm it.
- Clot-stabilizing medications. These anti-fibrinolytic medications — such as aminocaproic acid (Amicar) and tranexamic acid (Cyklokapron, Lysteda) — can help stop bleeding by slowing the breakdown of blood clots. Doctors often prescribe these drugs before or after a surgical procedure or tooth extraction.
- Drugs applied to cuts. A fibrin sealant (Tisseel VHSD) placed on a cut helps curtail bleeding. This is applied like glue using a syringe. There are also over-the-counter products to stop nosebleeds.
If your condition is mild, your doctor might recommend treatment only when you're having surgery or dental work or when you've had a trauma, such as a car accident.
Lifestyle and home remedies
These self-care tips can help you manage your condition:
- Switch pain relievers. To help prevent bleeding episodes, talk with your doctor before taking blood-thinning medications — such as aspirin, ibuprofen (Advil, Motrin IB, others) or naproxen sodium (Aleve). Your doctor might instead recommend pain and fever relievers such as acetaminophen (Tylenol, others).
- Tell your doctors and dentist. Let your doctors or dentist know that you have von Willebrand disease before you have surgery, start a new medication or give birth. Also mention whether anyone in your family has a history of excessive bleeding.
- Consider wearing a medical ID bracelet. Make sure it notes that you have von Willebrand disease, which will be helpful to medical personnel if you're in an accident or taken to an emergency room. Also carry a medical alert card in your wallet.
- Be active and safe. Exercise as part of attaining or maintaining a healthy weight. Avoid activities that could cause bruising, such as football, wrestling and hockey.
Preparing for an appointment
You'll likely see your family doctor if you think you have a bleeding problem. You then might be referred to a doctor who specializes in the diagnosis and treatment of bleeding disorders (hematologist).
Here's some information to help you get ready for your appointment.
What you can do
Ask about pre-appointment restrictions when you make the appointment. You might need to follow dietary restrictions or fast for eight to 10 hours if blood tests are scheduled.
Make a list of:
- Signs or symptoms that involve bleeding, including how often, how severe and for how long. Include unusual bruising. Your doctor will want to know if you have a history of nosebleeds or easy bruising since childhood or — for women — if your periods have been extended and heavy since you first started menstruating.
- Key personal information, including major stresses or recent changes — both positive and negative.
- Key medical information, including other medical problems and close relatives who bleed easily. Also list medications, vitamins or other supplements you take, including doses.
- Questions to ask your doctor.
Take a family member or friend along, if possible, to help you remember the information you'll be given.
For von Willebrand disease, questions to ask your doctor include:
- What's the most likely reason for my symptoms?
- What treatment do you recommend, and how will you monitor whether it's working?
- What are the possible side effects of the medications you're prescribing?
- Does this condition increase my risk of other medical problems?
- What steps will I need to take before having surgery or dental procedures?
- Does this condition increase my risk of health problems during pregnancy and childbirth? Are treatment options available to reduce that risk?
- Do I need to avoid certain physical activities or types of exercise?
- I have other health conditions. How can I best manage them together?
What to expect from your doctor
Your doctor might ask:
- Have you ever had bleeding from a small wound that lasted more than 15 minutes or recurred during the week following the wound?
- Have you ever had a nosebleed that lasted more than 10 minutes or needed medical attention?
- Have you ever had unexpected bruising? Have you ever felt a lump under the bruise?
- For women, for how many days do your menstrual periods last? How often do you have to change your tampon or sanitary pad during a period? Do you ever notice blood clots in your menstrual flow?
- Have you ever had blood in your stool that wasn't explained by a known medical problem, such as a stomach ulcer or colon polyp?
- Have you ever needed medical attention for bleeding during or after surgery, dental procedures, childbirth or injury?
- Have you ever had anemia or needed a blood transfusion?
What you can do in the meantime
While you wait for your appointment, avoid pain relievers that can increase your risk of bleeding episodes, such as aspirin, ibuprofen and naproxen sodium. If you need relief for aches and pains, try acetaminophen (Tylenol, others) instead.
Steer clear of contact sports associated with a high risk of bruising or injury, such as football and hockey. If you have any medical or dental procedures scheduled, tell your doctor or dentist about your history of heavy bleeding from minor injuries.
If you're having a procedure that's not urgent, reschedule it until after you've been evaluated for a bleeding disorder.