Pregnant women with rib pain may be related to the following causes: 1. Due to long-term repeated compression, the rapid growth of the fetus and amniotic fluid will continue to squeeze the rib cage upwards, which over time will cause sterile inflammation around the rib cage, resulting in rib pain. In addition, patients who sit or stand for a long time or wear bras with steel rings will also cause corresponding extrusion of the rib cage, which in turn causes pain. 2, due to shortness of breath, as the fetus and amniotic fluid upward will also squeeze the diaphragm, when the patient’s abdominal breathing will be greatly restricted, chest breathing will be greatly enhanced. The patient’s respiratory rate will also be accelerated due to the heavy load of the fetus and amniotic fluid. The patient will have prolonged shortness of breath due to various reasons, when the intercostal muscles will repeatedly pull on the ribs, which in turn will cause sterile inflammation of the ribs, leading to pain. 3. due to osteoporosis, due to the rapid growth of the fetus, which may cause a lack of calcium within the mother’s body and subsequently lead to osteoporosis. This may also lead to bony pain around the rib cage due to osteoporosis.