Swelling (edema) during pregnancy: normal vs concerning

By trimester

Weeks 1–13

1st trimester

Visible swelling is uncommon this early, since blood volume has not expanded much yet and preeclampsia usually does not appear before 20 weeks. If you notice puffiness in the face or hands in the first trimester, or it comes with a headache or a high blood pressure reading, mention it at your next prenatal visit rather than assuming it fits the usual later-pregnancy pattern.

Weeks 14–27

2nd trimester

Mild, symmetric swelling of the feet and ankles by the end of the day becomes more common as blood volume expands and vein walls relax. This is also when your provider starts watching more closely for preeclampsia, since it typically develops after 20 weeks. Any new swelling of the face or hands, especially if it appears quickly, is worth a same-day call rather than a wait-and-see approach.

Weeks 28–birth

3rd trimester

Swelling is usually most noticeable now, especially by evening, in hot weather, or after standing for long stretches, as the growing uterus presses on pelvic veins and slows blood return from the legs. The same warning pattern still applies: sudden swelling of the face or hands, a headache that will not go away, vision changes, or pain in the upper abdomen deserves a same-day call to your provider rather than waiting for a scheduled visit. Preeclampsia can also appear in the weeks right after delivery, so keep watching for this pattern postpartum too.

What does the evidence show for swelling?

• Sudden swelling of the face or hands, especially together with a headache that will not go away, vision changes, or sudden weight gain, is worth calling your ob-gyn about right away, especially in the second half of pregnancy. 1
• Hand and face swelling is one of several possible symptoms of pregnancy-related high blood pressure disorders, alongside high blood pressure itself, protein in the urine, headache, vision problems, abdominal pain, and nausea or vomiting. 2
• Lower leg swelling is an almost universal finding in late pregnancy, caused by increased venous pressure in the legs, lymphatic obstruction from the growing uterus, and lower plasma protein levels that let fluid shift into surrounding tissue. 3
• More than half of women report swelling of the foot, ankle, or leg during pregnancy, making it one of the most common lower-body changes new mothers describe afterward. 4
• Wearing graduated compression stockings during pregnancy can meaningfully limit ankle and calf swelling: one randomized trial found a much smaller increase in leg measurements than in a control group, and most participants said they would wear the stockings again. 5

When should I call my provider about swelling?

Sudden or new swelling in your face or hands, especially if it comes on quickly rather than building gradually, is different from ordinary ankle and foot swelling. It is one of the symptoms of pregnancy-related high blood pressure disorders, alongside a headache that will not go away, vision changes, and pain in the upper abdomen, and the combination points toward preeclampsia rather than normal fluid retention. Consult your healthcare provider the same day if you notice that pattern, particularly in the second half of pregnancy, rather than waiting for your next scheduled visit. Trust your read on your own body. If something feels off beyond the list above, please consult your healthcare provider rather than waiting it out.