The pain on both sides of the bottom in the 8th month of pregnancy is mostly considered to be caused by the physiological situation in late pregnancy and preterm labor, so you can go to the hospital for examination to clarify the causes and then carry out targeted treatment. Common causes and treatment 1, physiological factors: with the increase of pregnancy week, the uterus increases, the weight is increasing, will pull the surrounding ligaments, and even the posterior position of the uterus or fetal head, will also compress the nerve caused by the pain on both sides of the bottom, belongs to the normal physiological phenomenon, usually pay attention to more rest, do not strenuous exercise, most through the position adjustment can be self-relieved; 2, preterm labor: pregnant women 8 months of pregnancy pain on both sides of the bottom, and the pain is Regular enhancement, accompanied by vaginal bleeding, abdominal hardness, swelling and other symptoms, mostly considered as preterm labor. The pregnant woman should immediately go to the hospital for fetal preservation treatment, give drugs to inhibit contractions, such as nifedipine, magnesium sulfate, give dexamethasone to promote fetal lung maturation, and at the same time perform ultrasound examination to exclude abnormalities such as placenta abruptio. Attention: 8 months of pregnancy is the late stage of pregnancy, you should pay close attention to fetal movement, monitor blood pressure and blood sugar, and try to stay in the left side position when you sleep. Eat a reasonable diet, do not consume too much carbohydrates and saturated fats to avoid an oversized fetus, and exercise slowly and appropriately, such as walking and yoga, to facilitate labor.