Edema does not usually occur in early pregnancy. In the middle and late stages, as the embryo grows and the hormone level in the body changes, edema can appear. The main methods to prevent edema during pregnancy are: first, adjust the rhythm of work and daily life. The mother-to-be should ensure sufficient rest time and not be overly stressed and strained. Secondly, wear comfortable shoes and socks. The mother-to-be should not wear overly tight socks that will press on the ankles and calves to avoid affecting blood circulation. If conditions allow, you can do proper physical exercise, which is beneficial to reduce edema. Thirdly, wear suitable clothes. Wearing tight clothes will cause your blood circulation to be poor, thus triggering body swelling, try to wear comfortable clothes during pregnancy. Fourth, do not stand or sit for a long time. Fifth, elevate your legs, it is recommended that pregnant mothers elevate their legs for at least 15-20 minutes before bed or at rest, which can play a dual role in accelerating blood return and reducing intravenous pressure, which can reduce or alleviate edema during pregnancy. Sixth, sleep on the left side, so as to avoid pressure on the veins of the lower limbs and reduce the resistance to blood return. Seventh, try to control the intake of salt in daily life, the intake of 10g or less. Eighth, eat enough protein and fruits and vegetables. So the mother must make sure to eat meat, fish, shrimp, protein, milk and other animal foods and legumes every day to ensure adequate absorption of vitamins and trace elements. If self-treatment does not relieve, hospital consultation is recommended, and other diseases should also be excluded.