Sudden swelling of the feet in the late stages of pregnancy is not usually a sign of impending labor, but is often caused by uterine compression or disease factors.
During pregnancy, there are usually no symptoms of edema, but when the feet suddenly swell in late pregnancy, most of them are caused by the uterus pressing on the inferior vena cava. Pregnant women can properly elevate their feet when resting and sleep in the left lateral position, usually on the morning of the second day, the symptoms of edema will be significantly reduced or disappear.
If a woman suffers from more serious diseases that tend to cause edema during pregnancy, such as kidney disease, gestational hypertension syndrome, etc., the symptoms of swollen feet may also appear suddenly, and she should consult a doctor in time.
During pregnancy, you should go for regular checkups and seek early medical attention if you feel unwell.