Left buttock pain during pregnancy, may be caused by the increasing uterine compression of the nerves, compression of the sciatic nerve is more likely, usually pay attention to avoid prolonged sedentary, each time to sit for 45-50 minutes, you can appropriate activities for 5-10 minutes, you can take the right side of the rest position, try to minimize the pressure on the left buttock. After resting, the pain will be gradually relieved, if the pain is not relieved, or even continue to aggravate, you must go to the pain department for examination, even if it is not suitable to take pain medication, you can consider applying hot compresses, or acupuncture, physiotherapy, etc. to relieve the pain, severe pain will affect the mother’s rest, and to a certain extent, it will affect the development of the fetus. It is not recommended that pregnant women take painkillers, which may affect the development of the fetal heart.