The enlargement of the uterus after pregnancy, which constantly stimulates the lower edge of the rib cage, can cause dull pain in the rib cage or pain due to the flaccid separation of the pubic symphysis, or even lead to restricted movement and a feeling of tightness may be felt. However, these conditions are normal physiological reactions to pregnancy and do not require special treatment, and can be relieved by lying on the left side and resting in bed more often.