Swollen ankles and feet after flying: what to know

Keeping your legs bent and still for a long journey reduces the calf-muscle action that helps blood return upwards. Cabin conditions and gravity can make fluid collect around the feet, so both ankles may feel tight when you stand after landing. This often improves with walking and time. However, prolonged immobility can also be associated with a blood clot in a deep vein. Varicose veins, obesity, recent surgery, pregnancy, and previous clots can affect personal risk, so mention these factors when seeking advice.

Move your feet and ankles regularly while seated, change position when possible, and walk around safely during the journey when permitted. After landing, take a gentle walk and avoid restrictive shoes or socks. Drink normally and follow advice from your clinician if you have a fluid restriction. Do not take aspirin or anticoagulant medicine solely for travel unless prescribed for you. If you have had a clot or have another risk factor, ask a clinician before travelling about a personal prevention plan.

Seek emergency help for sudden breathlessness, chest pain, coughing blood, faintness, or a fast or irregular heartbeat. Obtain urgent medical assessment for swelling that is mainly in one leg, especially with calf pain, tenderness, warmth, redness, or a heavy feeling. Arrange a review if both ankles stay swollen after rest, swelling repeatedly follows travel, or you develop new breathlessness or reduced exercise tolerance. Tell the clinician when the flight ended and when symptoms began.

Do my health conditions or medicines increase clot risk? Should I use compression socks, and what fit is appropriate? What symptoms should make me stop travelling and seek immediate help?