Pregnant women with calf edema need to strengthen exercise when it is caused by physiological reasons, and should control high salt and use anticoagulant therapy to intervene when it is caused by pathological reasons such as hyperemesis gravidarum and local thrombosis. 1. Physiological causes: Pregnant women can exercise moderately in daily life to make venous blood flow back to the heart better. At the same time, it is recommended to rest in the left lateral position to avoid compression of the veins of the lower limbs and relieve the symptoms of edema. 2. Pathological causes: If the cause of edema in the calves of pregnant women is caused by hyperemesis gravidarum, the intake of salt should be reduced under the guidance of the doctor, and protein should be supplemented appropriately. If the cause is caused by local thrombosis, it should be treated in a targeted way under the guidance of the doctor, such as lower extremity vein thrombectomy, anticoagulation therapy. If the symptoms of edema in the lower legs of pregnant women are not relieved, or accompanied by other symptoms, they should go to the hospital in a timely manner, to identify the cause and then give targeted treatment.