Leg swelling after sitting at a desk all day

When the legs stay still and lowered, the calf muscles pump less blood and fluid back upward. Socks may leave deeper marks and the ankles may feel tight by the end of the day. Swelling that affects both legs and improves after movement is often less concerning than swelling that begins suddenly on one side. Medicines, vein problems, kidney disease, heart failure, or other conditions can also contribute, so the pattern matters.

Change position regularly, take brief walking breaks, and flex and point your ankles while seated. When resting, support your legs comfortably rather than letting them hang down. Wear shoes that do not squeeze swollen feet, keep skin clean and moisturised, and avoid changing medicines or starting tight compression socks without clinical advice. Record whether the puffiness improves overnight or returns each workday.

Arrange medical advice if swelling persists, keeps returning, becomes painful, or is associated with skin colour changes, warmth, or a tender calf. Get emergency help for sudden shortness of breath, chest pain, faintness, or coughing blood. A clinician may need to examine circulation and review your health history rather than attributing everything to sitting.

Ask whether your swelling pattern suggests dependent oedema, a vein problem, or another cause. Discuss safe workplace movement, whether compression is suitable, and which changes in pain, skin appearance, or breathing should prompt urgent care.