Both legs swelling: what to know

Swelling may involve the feet, ankles, calves, or the whole lower leg. It can follow long periods of sitting or standing, travel, reduced activity, heat, or a salty diet. Varicose veins may cause aching and swelling that builds during the day. Medicines and conditions affecting the heart or kidneys can also play a part. The pattern, timing, skin appearance, and other symptoms help a clinician narrow the cause.

Keep a brief record of when swelling appears and whether it improves overnight. Change position regularly, take gentle walks if comfortable, and support your legs when seated. Wear loose footwear and protect stretched skin from cuts. Do not alter prescribed treatment or use compression socks until a clinician confirms they are suitable, particularly if you have circulation disease or unexplained pain.

Get emergency help for chest pain, sudden difficulty breathing, fainting, confusion, or coughing blood. Seek same-day advice when swelling develops quickly, becomes painful or hot, or one side becomes clearly larger. Arrange a routine appointment for swelling that persists, repeatedly returns, or occurs with breathlessness when lying down or a noticeable reduction in urine.

Tell your clinician about recent travel, activity changes, new medicines, and any heart, kidney, liver, or vein history. Ask what tests, leg elevation, exercise, or compression plan fits your situation.