Leg swelling and water retention

Fluid may collect around the ankles and lower legs, making socks leave deeper marks or the skin feel tight. It can be more noticeable after prolonged sitting or standing and may ease after resting with the legs raised. Salty meals, heat, some medicines, reduced movement, and pregnancy can influence swelling. Conditions affecting the veins, kidneys, or heart can also cause it. The appearance of oedema cannot show which cause is responsible, so avoid assuming that swelling is simply dietary or harmless.

Break up long periods of sitting with gentle movement, raise your legs when resting, and keep footwear comfortable. Continue your usual fluid intake unless a clinician has given you a specific restriction. Review new medicines with a pharmacist or doctor rather than stopping them yourself. Avoid water tablets, detox products, and severe dietary changes without advice. Keep a short record of timing, both-sided or one-sided swelling, weight change, urine changes, and breathlessness.

Arrange prompt care if one leg becomes swollen, painful, warm, or red, or if swelling appears suddenly. Emergency assessment is needed for chest pain, breathlessness, faintness, or coughing blood. Book a medical review when swelling persists, repeatedly returns, affects daily activity, or accompanies reduced urine, facial puffiness, unusual fatigue, or breathlessness when lying down.

Ask whether your medicines, circulation, kidney function, or heart health could contribute, and which tests are appropriate. Explain when the swelling started and whether it changes overnight, after activity, or after raising your legs.