The first thing you need to do is to take a look at the situation and see if you can find a solution to the problem.2. If the ligaments are involved because the uterus is increasing in size during the pregnancy and the nerves in the lower back are stimulated and the pain in the lower back occurs, then continue to observe and do not need to do any special treatments if the symptoms gradually decrease or disappear after taking a bed rest.3. If the pain in the lower back is very serious, then you should go to the regular hospital. Go to the regular hospital, because do not rule out the possibility of preeclampsia, need to further improve the relevant examination, to determine the growth and development of the fetus in the uterus. If necessary, you need to use progesterone capsules, fetal pills, vitamin E under the guidance of a physician to protect the fetus symptomatic treatment, which is safer and more conducive to the healthy growth and development of the fetus in the uterus.