How can I reduce leg-clot risk during long travel, and do I need aspirin?
Regular movement, calf exercises and avoiding prolonged uninterrupted sitting help during long travel. Previous clots, recent surgery, pregnancy and cancer can increase risk. Do not self-start aspirin or anticoagulant injections, and not every traveller needs compression stockings.
Details
Discuss risk before departure
Review travel duration and health history with a clinician. Selected higher-risk travellers may need correctly fitted compression stockings or prescribed prophylaxis. Aspirin is not routine; special-case recommendations depend on balancing bleeding and clot risk.
During the journey
Move ankles, contract calf muscles and walk when safe. Long car or bus journeys also need suitable breaks. Drink normally; water does not replace movement and is not proven to prevent travel-related clots by itself.
Stay alert after arrival
New one-sided leg swelling and pain needs urgent assessment. Sudden breathlessness, chest pain or fainting requires emergency help for possible pulmonary embolism. Do not massage a swollen leg instead of obtaining assessment.
Related reading: What causes night-time leg cramps, and how can I relieve them?.