Sore feet at night when you are pregnant and unable to sleep may be caused by overwork, poor venous return and calcium deficiency. Symptoms can be relieved by improving lifestyle, hot compresses and calcium supplements. 1. Overwork: If you stand or labor for a long time during pregnancy, it may cause the accumulation of lactic acid in the foot muscles, resulting in sore feet at night and inability to sleep. Symptoms can be relieved by taking rest, combining work and rest, and avoiding prolonged standing or labor. 2. Poor venous return: The increasing size of the uterus during pregnancy may compress the blood vessels in the abdominal cavity, leading to poor venous return in the lower extremities and causing sore feet at night, making it impossible to sleep. You can try to elevate the lower limbs during rest to promote blood circulation, and you can also choose local hot compresses to relieve the symptoms. 3. Calcium deficiency: The demand for calcium increases during pregnancy, and if there is a calcium deficiency, it may cause osteoporosis, resulting in sore feet at night. You can take calcium supplements under the guidance of your doctor to alleviate the symptoms. If you are pregnant and can’t sleep with sore feet for a long time at night, you should go to the obstetrics department of a regular hospital to find out the cause of the disease and take targeted measures under the guidance of a professional doctor.