Back pain around 16 weeks of pregnancy can be improved by resting more, adjusting posture and taking calcium supplements. During pregnancy, the influence of hormones in the body will lead to ligament laxity, and at the same time, the uterus enlarges and presses on the waist, which will make it easier for back pain to occur. Pregnant women can rest more, do not sit, stand or lie down for a long time. You can change the position, do not keep a position for a long time, usually to combine work and rest, you can walk around appropriately to relieve the symptoms of soreness. After 16 weeks of pregnancy, the development of the fetus needs to intake more calcium, pregnant women who lack calcium will also have back pain. This is can be under the guidance of the doctor appropriate supplementation of calcium supplements, such as calcium carbonate, etc., which can also alleviate the situation of back pain. There may be other reasons for back pain around 16 weeks of pregnancy, if the back pain is severe and relief through the above methods is not obvious, you need to consult a doctor in time to clarify the cause of the disease and target treatment.