Stop The Clot,
Spread The Word

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Blood clots do not discriminate by age, gender, ethnicity or race. Blood clots affect everyone. Up to 900,000 people are affected by blood clots every year.
About 100,000 people die every year due to blood clots.
On average, 1 person dies every 6 minutes due to a blood clot.1 Don’t let that person be you or someone you know.
Blood clots can be prevented.

A Blood Clot Can Happen to Anyone.
Don’t Let a Blood Clot Happen to You.
Blood Clots Can Be Prevented.

Learn Your Risk

If you think you might be too young or too physically fit to experience a blood clot, think again. Blood clots do not discriminate. They affect people of all ages, race & gender.

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Know the Signs & Symptoms

There are several important signs and symptoms of blood clots. If you can recognize these signs and symptoms, you can save your life or the life of a friend or family member.

Learn more

Blood Clots Are Preventable

Blood clots are preventable and can be safely treated.  You can reduce your risk by learning some of the best ways to protect yourself from life-threatening blood clots.

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Understanding Blood Clots

A blood clot in one of the large veins, usually in a person’s leg or arm, is called a deep vein thrombosis or DVT. When a blood clot like this forms, it can partly or completely block the flow of blood or blood circulation in the body. If this clot is not treated, it can move or break off and travel to the lungs. A blood clot in the lung is called a pulmonary embolism or PE, and can cause death and requires immediate medical attention.

Watch this short video above to learn more about blood clots
and your potential risk factors.

Know your Risk Factors

Blood clots do not discriminate by age, gender, ethnicity or race.
Blood clots affect everyone: From infants and young children to teens and senior citizens too.
Across the country and around the globe. Elite athletes, public servants, musicians, doctors, nurses, business associates, and people from all walks of life are affected.
You can protect yourself against life-threatening blood clots if you know your risk factors.

List of blood clot risk factors

The first and most important thing you can do to protect yourself from a life-threatening blood clot is to learn if you are at risk.

To the right is a list of some of the most common risk factors for blood clots.

Click on the icon below and you can download and print this checklist, and then discuss your potential risk factors with your doctor or healthcare provider.

Download The Risk Checklist

Am I at risk for a blood clot?

Blood Clot Risk Factors

  • Hospitalization for illness or surgery
  • Major surgery, particularly of the pelvis, abdomen, hip, knee
  • Severe trauma, such as a car accident
  • Injury to a vein that may have been caused by a broken bone or severe muscle injury
  • Hip or knee replacement surgery
  • Cancer and cancer treatments
  • Use of birth control methods that contain estrogen, such as the pill, patch or ring
  • Pregnancy, which includes the six weeks after the baby is born
  • The use of hormone replacement therapy, which contains estrogen
  • A family history of blood clots
  • Obesity
  • Confinement to bed
  • Sitting too long, especially with legs crossed

Know the Signs and Symptoms of Blood Clots

There are several important signs and symptoms of blood clots. If you can recognize these signs and symptoms, you can save your life or the life of a friend or family member.

If you experience any of the following signs or symptoms…


Blood Clots in Your Leg or Arm

call your doctor as soon as you can.

– Swelling of your leg or arm –
– Pain or tenderness not caused by an injury –
– Skin that is warm to the touch –
– Redness of the skin –


Blood Clots in Your Lungs

seek medical attention immediately.

– Difficulty breathing –
– Chest pain that worsens with a deep breath –
– Coughing, or coughing up blood –
– Faster than normal or irregular heartbeat –

Blood clots can be safely treated.

Blood Clots can be prevented

The Best Ways to Prevent Blood Clots Include:

Know your risks and recognize the signs and symptoms.

Tell your doctor if you have risk factors for blood clots.

Before any surgery, talk with your doctor about blood clots.

See your doctor as soon as you can if you do have any symptoms.

Other steps you can take to prevent blood clots:

Tell your doctor and also other members of your family if you do learn that there is a history of blood clots among your relatives.

If you are confined to a bed in a hospital or at home after surgery or due to illness or paralysis, ask your doctor about the best way to prevent blood clots.

Get up and move if you’ve been sitting for a long time or traveling a long time by plane, train, or car. Stand up, walk around, and stretch your legs every two to three hours.

Maintain a healthy weight. Also, don’t smoke or quit smoking to help reduce your risks and prevent blood clots.

Stop The Clot, Spread The Word™

The National Blood Clot Alliance and the Centers for Disease Control and Prevention are working on this important public health campaign to get the word out about blood clot risks and the signs and symptoms of blood clots.

You can be an important part of this education campaign by helping us


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The information and materials on this site are provided for general information purposes only. You should not rely on the information provided as a substitute for actual professional medical advice, care, or treatment. This site is not designed to and does not provide medical advice, professional diagnosis, opinion, treatment, or services to you or any individual. If you believe you have a medical emergency, call 911 immediately.

Stop the Clot, Spread the Word™ is a public education campaign made possible by funding provided to the National Blood Clot Alliance by the Centers for Disease Control and Prevention under Cooperative Agreement number 1U27DD001153-01.

National Blood Clot Alliance and CDC logos

The mark ‘CDC’ is owned by the US Dept. of Health and Human Services and is used with permission. Use of this logo is not an endorsement by HHS or CDC of any particular product, service, or enterprise.

1 Source:  Calculation based on 100,000 deaths per year, The Surgeon General’s Call to Action to Prevent Deep Vein Thrombosis and Pulmonary Embolism, 2008