23/07/2026
Why does swelling happen during pregnancy?
If you've noticed your rings don't fit anymore or your ankles seem to disappear by the end of the day—you're definitely not alone.
Swelling (also called oedema) is incredibly common during pregnancy, particularly in the third trimester.
Here's why:
💙 1. Your blood volume increases
During pregnancy, your blood volume increases by around 40–50% to support both you and your growing baby.
More fluid circulating means it's easier for some of it to collect in your feet, ankles and hands.
💙 2. Your body naturally retains more fluid
Hormones encourage your body to hold onto extra water to support pregnancy and prepare for birth.
💙 3. Hormones relax your blood vessels
Pregnancy hormones cause your blood vessels to relax, making it easier for fluid to move into surrounding tissues.
💙 4. Your growing uterus puts pressure on your veins
As your baby grows, your uterus can reduce blood flow returning from your legs.
This makes swelling in the feet and ankles much more noticeable—especially after standing for long periods.
⚠️ When swelling isn't normal
Seek urgent medical advice if swelling is:
• Sudden or severe
• Mainly affecting your face or hands
• Accompanied by headaches
• Associated with blurred vision
• Associated with upper abdominal pain
• Accompanied by shortness of breath
These symptoms can sometimes indicate conditions that need prompt assessment.
Always contact your healthcare provider if you're unsure.
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