The pubic bone is located at the junction of the root of the thigh and the small abdomen, this part of the pain, most pregnant people think that the emergence of pubic bone pain recently will give birth, in fact, pubic bone pain is not a sign of labor. Generally occur in the second trimester, as the fetus increases, the uterus and the entire abdominal cavity swells, compressing the pubic symphysis; the relaxin secreted by the placenta in the second trimester relaxes the ligaments, often referred to by the old people as open bones, leading to the relaxation of the ligaments linking the pelvis, the separation at the pubic symphysis, and the soreness at the root of the thigh, especially when changing positions, and is significantly affected when getting up or standing up. As the weeks of pregnancy increase, most women experience varying degrees of pubic bone pain, some with mild symptoms and some more severe, affecting daily life. The symptoms are more severe and last longer in pregnant women with clinical findings of calcium deficiency. Most pregnant women will have pubic bone pain reduced or disappeared after delivery, but if the symptoms are not reduced, it is best to undergo professional orthopedic examination and treatment. After the appearance of pubic bone pain should pay attention to rest, do not stand for a long time, avoid excessive force on the waist and abdomen, appropriate massage or use belly band to relieve the symptoms. Pay attention to reasonable nutrition, appropriate supplementation of calcium-rich food or calcium tablets if necessary (daily intake of 1000mg of calcium should be guaranteed in late pregnancy, the maximum dose that can be tolerated is 2000mg), increase outdoor activities, promote the synthesis of vitamin D and increase the absorption of calcium. If the pain is more severe, lasts longer, and is accompanied by other physical discomfort, you need to go to the orthopedic department of a regular hospital for examination and treatment.