Physiological edema in pregnancy

Swelling often appears in the feet, ankles, legs or fingers and may be more noticeable after standing or later in the day. Pregnancy changes how much fluid circulates, while the growing uterus can slow blood returning from the legs. Mild, gradual swelling on both sides may fit this pattern.

Swelling alone does not diagnose anaemia. Anaemia in pregnancy more often prompts symptoms such as unusual tiredness, reduced energy, breathlessness or paleness, which deserve a separate discussion with your maternity team. [Tiredness in Pregnancy](/symptoms/tiredness-in-pregnancy/) may have several explanations, including low haemoglobin.

Rest with your legs supported, avoid standing still for long periods, and wear comfortable shoes that do not constrict your feet. Gentle walking and ankle movements can support circulation. Drink normally unless your clinician has given different advice, and avoid taking water tablets or herbal products without guidance. Do not start iron because of swelling alone; testing can show whether [Iron Therapy](/treatments/medical-gynaecology/iron-therapy/) is appropriate.

Contact your maternity service promptly if swelling appears suddenly, is marked in the face or hands, affects one leg more than the other, or occurs with headache, vision changes, upper abdominal pain, breathlessness, chest pain or feeling very unwell. One-sided leg swelling with pain or warmth also needs urgent assessment. These patterns can signal problems unrelated to ordinary pregnancy fluid retention.

Ask: Is my swelling consistent with normal pregnancy changes? Should my blood pressure and urine be checked? Do I need a blood test for haemoglobin or iron status? Which activities and warning signs should guide my next contact?