Sore and swollen legs at night during pregnancy can be caused by calcium deficiency and pressure from blood vessels in the pelvis. Some pregnant women experience some leg soreness and bloating during pregnancy, which may be due to calcium deficiency in the body. You need a lot of calcium throughout your pregnancy and you need to take more calcium supplements. If there is a calcium deficiency, leg soreness and leg cramps may occur. In addition, as the uterus gradually increases in size, due to its pressure on the pelvic blood vessels, resulting in impaired blood circulation in the lower limbs, restricted reflux, etc., leg soreness and bloating may also occur. In daily life, pay more attention to rest, pay attention to calcium, do not exercise strenuously, when the legs are sore and swollen, can be appropriate for the calf part of the hot compress. Don’t sleep in the flat position for a long time, more often take the left side of the lying position may make the symptom somewhat relieved. If the leg pain is more serious, it is recommended to go to the hospital in time to avoid aggravation of the condition.