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Deep vein thrombosis (DVT) is a blood clot that forms in a deep vein, most often in the leg or pelvis. It occurs when blood flow slows, a vein is injured, or the blood has a higher tendency to clot. DVT is a medical condition that should be discussed with a qualified clinician, especially when a person has new leg swelling or other concerning symptoms. Here’s information on the risk factors of developing deep vein thrombosis and how to minimize them:
What Is Deep Vein Thrombosis?
Deep veins sit deeper inside the body than surface veins, and they carry blood back toward the heart. When a clot forms in one of these deeper veins, it can affect normal circulation in that area. Deep vein thrombosis often develops in the leg or pelvic veins, but it can occur in other deep veins. Common symptoms of deep vein thrombosis include swelling, tenderness, skin warmth, or changes in skin color.
Some people may have few or no clear symptoms. Because symptoms can overlap with other conditions, a clinician should evaluate concerns rather than relying on self-assessment. Understanding DVT risk factors can help you prepare for medical visits, travel, surgery, pregnancy, or long periods of reduced movement.
What Are the Risk Factors?
Several factors can increase the chance of developing DVT, such as family history and cancer. Risk is often higher when more than one factor is present. Some common risk factors include:
- Inactivity or Limited Movement: Long periods of sitting or lying down slow blood flow in the legs.
- Recent Surgery or Injury: Surgery, especially procedures involving the legs, hips, pelvis, or abdomen, may affect mobility and blood flow during recovery.
- Age: DVT risk tends to increase with age, especially when combined with reduced activity or other health conditions.
- Pregnancy and the Postpartum Period: Physical changes during pregnancy and the weeks after delivery may affect circulation and clotting tendency.
- Smoking: Tobacco use affects blood vessels and overall vascular health.
- Obesity: Extra body weight may place additional pressure on veins and is commonly linked with lower activity levels.
- Prior History of Blood Clots: A personal or family history of DVT or pulmonary embolism indicates a potential shared genetic factor that increases risk.
Some risk factors are temporary, while others may be long-term. A clinician can help place these factors in context based on your health history, medications, and planned activities.
How Do You Reduce Risks?
DVT risk reduction centers on planned movement and attention to situations that may slow circulation. During long periods of sitting, such as desk work or extended travel, walk or stretch to move the ankles and calves when possible. After surgery or injury, follow your care team’s instructions for activity, wound care, and prescribed medications, and ask when it is appropriate to resume movement.
Maintaining a healthy weight, avoiding smoking, staying active, and managing chronic conditions may support overall vascular health, and some people will be advised to wear compression garments for specific circumstances. Changes in pain or skin color should be reviewed by a medical professional, especially when risk factors are present. Ask your doctor for a list of other signs of concerning changes.
Practical risk reduction may include regular movement during long periods of sitting, careful planning before travel or surgery, and open discussion with a clinician about your:
- Medications
- Personal History
- Family History
You cannot change or reduce some risks, but you can take practical steps to reduce avoidable risks. The right approach depends on your medical history, current health, and upcoming events.
Contact a Vascular Specialist
A vascular specialist can review risk factors, symptoms, medical history, and lifestyle habits related to DVT. They may help determine whether further evaluation is appropriate and discuss risk-reduction options based on your situation. If you have concerns about deep vein thrombosis, schedule a visit with a qualified vascular specialist or speak with your primary care clinician for guidance.
