The causes of heel pain in late pregnancy include calcium deficiency, progesterone effect, and reduced blood flow to the feet. 1. Calcium deficiency: when in the middle and late stages of pregnancy, due to the continuous absorption of calcium by the fetus, resulting in a gradual decrease in the blood calcium of pregnant women, which puts the bones at a relatively calcium-deficient level and promotes the occurrence of osteoporosis. At the same time, because the heel has to bear the body’s entire strength, when this part of the long time by the pressure of gravity, coupled with the bones in the state of osteoporosis, which will lead to heel pain. 3. The role of progesterone: progesterone can lead to ligament elongation, ligament laxity, so when in late pregnancy, progesterone will promote the heel ligament elongation, thus affecting the normal anatomical parts of the heel, thus causing mild heel pain. 3. Reduced blood flow to the feet: the enlarged uterus in late pregnancy compresses the inferior vena cava, causing venous return to the feet to be impeded, leading to swelling of the feet and heel pain. When symptoms of heel pain occur in late pregnancy, it is recommended to consult a doctor in time, after clarifying the cause, through calcium supplementation, rest, massage and other ways to make the symptoms get appropriate relief. If the symptoms are serious or persistently unrelieved, it is recommended to go to the hospital for treatment under the guidance of the doctor.