Who Is at Risk?
Traffic-related incidents are one of the leading causes of injury and mortality among international travelers, particularly in countries with lower safety standards.
Anyone can develop DVT, but certain factors increase the risk:
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Age over 40
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Personal or family history of blood clots
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Recent surgery or injury, especially to the lower limbs
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Pregnancy or recent childbirth
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Use of hormonal birth control or hormone replacement therapy
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Cancer and some cancer treatments
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Obesity or smoking
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Long-haul travel (flights or journeys over 4 hours)
If you have one or more of these risk factors, it’s especially important to take preventive measures.
Symptoms of DVT and Pulmonary Embolism
DVT may cause:
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Swelling in one leg (or arm)
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Pain or tenderness, often starting in the calf
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Warmth or redness over the affected area
Pulmonary embolism symptoms can include:
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Sudden shortness of breath
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Chest pain that worsens with deep breathing
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Rapid heartbeat
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Coughing, sometimes with blood
Seek immediate medical attention if you experience any of these signs, especially after recent travel.
Avoid Blood Clots
Extended travel by air, car, or train can elevate the risk of developing blood clots, particularly in the lower limbs. This condition, known as deep vein thrombosis (DVT), becomes especially concerning when a clot dislodges and travels to the lungs, leading to a pulmonary embolism (PE), a serious and potentially life-threatening complication. While the risk is present for all travelers, certain individuals face increased susceptibility due to pre-existing factors or prolonged immobility.
Understanding Blood Clots During Travel
A blood clot develops when blood thickens and forms a semi-solid mass. In the case of DVT, this typically occurs in the deep veins of the legs, where circulation may become restricted during extended periods of sitting. Reduced mobility, inadequate hydration, and confined seating conditions are common contributors to clot formation during travel. With appropriate preventive measures, however, most cases can be effectively avoided.
How to Prevent Blood Clots During Travel
Move Frequently
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On flights or long drives, aim to move your legs every 1–2 hours.
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Get up and walk the aisle if you're on a plane.
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Do seated exercises such as ankle rolls, toe taps, and leg lifts to improve circulation.
Wear Compression Stockings
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Medical-grade compression stockings help promote blood flow in the legs.
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Unsuitable for some individuals and further consultation may be required; for example individuals with peripheral artery disease, neuropathy or other sensory impairments, severe edema (swelling) due to heart failure, severe skin conditions or infections and other conditions.
Stay Hydrated
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Drink plenty of water before and during travel.
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Avoid alcohol and caffeine, which can dehydrate you.
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Avoid Tight Clothing
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Wear loose, comfortable clothing to avoid restricting blood flow.
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Consider Medication if Advised
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High-risk travelers may be prescribed low-dose blood thinners or advised to use compression stockings.
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Speak to a travel health professional before your trip if you fall into a high-risk category.
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Don’t Cross Your Legs for Long Periods
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This posture can restrict circulation and contribute to clot formation.
