Leg swelling in pregnancy: when to worry

As pregnancy progresses, the growing uterus can affect blood flow from the legs, while pregnancy-related changes can encourage extra fluid in the tissues. Swelling in both feet and ankles that builds gradually and is milder after resting may fit this pattern.

Swelling that appears quickly, affects the face or hands, or comes with a severe headache, vision changes, upper abdominal pain, or feeling very unwell can be linked with pre-eclampsia. A painful, warm, red, or notably larger single leg can signal a clot and needs urgent assessment.

Rest on your side, raise your legs when sitting, avoid standing still for long periods, and wear comfortable shoes. Gentle movement such as short walks or ankle exercises can support circulation if your maternity team has said activity is suitable.

Do not start medicines, compression garments, or supplements for swelling without checking with your midwife or doctor. Notice when the swelling began, whether one side is worse, and whether it changes after rest; these details help guide assessment.

Contact your maternity team promptly for sudden worsening swelling, swelling of the face or hands, a severe or persistent headache, visual disturbance, pain below the ribs, or reduced wellbeing. Seek urgent help for one-sided leg swelling with pain, warmth, or redness, or for chest pain, sudden breathlessness, or coughing blood.

Ask whether your pattern of swelling needs a blood-pressure check, urine check, or leg assessment. You can also ask which activities are suitable, whether compression is appropriate, and what changes should prompt an immediate call.