The causes of lumbago and buttock pain symptoms in pregnant women are usually caused by lumbar spine lesions or osteoporosis. The specific reasons are: a. During pregnancy, pregnant women do not control their diet, overeat or often eat high-fat, high-salt, high-sugar food, so that the caloric intake is too much, the weight gain is too fast, and the pressure on the lumbar spine area is too great, causing lumbar disc lesions and lumbago symptoms. When the sciatic nerve is stimulated, it will cause buttock pain. Second, the incorrect posture of pregnant women when standing, walking or sitting puts too much pressure on the lumbar spine area, causing the corresponding clinical symptoms. Third, osteoporosis, in principle, pregnant women should take appropriate calcium supplements from the fourth month of pregnancy. If pregnant women do not take calcium supplements during pregnancy, it can lead to serious osteoporosis symptoms and cause bone pain.