Sore feet of pregnant women may be caused by swelling of lower limbs, hypokalemia, anemia, calcium deficiency and other reasons. 1. Swollen lower limbs: Increased blood volume during pregnancy, increased uterine pressure on varicose vein reflux in the lower limbs, lack of activity and other factors can lead to swelling of the lower limbs, so the feet will be sore and soft. 2. Hypokalemia: Increased nutritional demand during pregnancy, insufficient nutritional intake of pregnant women, frequent vomiting and other factors can lead to potassium deficiency and reduced nerve excitability, so the feet will be sore and weak. 3. Anemia: Insufficient intake of iron, folic acid and other nutrients during pregnancy can lead to anemia, which causes the symptoms of sore feet due to ischemia of the muscles of the lower limbs and other tissues. 4. Calcium deficiency: Insufficient calcium intake during pregnancy can lead to osteoporosis of the lower limbs, which can be manifested in the symptoms of sore feet. In addition, pregnant women with sore feet may be related to a variety of factors, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor in order to clarify the specific causes.