Pelvic pain in pregnant women may be caused by improper sleeping position, localized inflammation, and calcium deficiency. It can be relieved by behavioral intervention, physical therapy, medication and so on. 1. Improper sleeping position: you can take the side of the way to rest, can take the right and left side alternately, this can relieve the unilateral pressure on the pelvis. But do not lie on the back, because in this position, the fetus or amniotic fluid may produce pressure on the posterior abdominal aorta, resulting in poor blood circulation in the lower limbs, which may also produce lower limb edema. 2. Local inflammation: Slight massage can be performed on the muscles around the pelvis to promote local blood circulation, eliminate inflammation and relieve pain; hot compresses can also be applied to the painful areas, which can also promote blood circulation and relieve pain. 3. Calcium deficiency: Pelvic pain in pregnant women may be caused by calcium deficiency, in the middle and late stages of pregnancy, the fetus grows faster, the demand for calcium will increase, if the pregnant woman is not enough supplement during pregnancy, it is easy to cause pelvic pain. Calcium tablets can be taken orally on medical advice. It is recommended to go to the hospital immediately if the above symptoms are not relieved in time, and pay attention to rest during the day.