Pregnant women with one leg pain is mostly caused by calcium deficiency or uterine enlargement, but need to exclude trauma, deep vein thrombosis and other abnormalities caused by leg pain, according to different causes using the appropriate methods to deal with. 1, calcium deficiency: pregnant women during pregnancy, the body of the fetus develops faster, the demand for calcium and other trace elements will be higher, if not timely supplementation, there will be calcium in pregnant women lead to calf muscle twitching, can occur in One leg or both legs pain, pregnant women should eat more food containing calcium or supplement calcium tablets; 2, the uterus increases: with the increase of pregnancy week, the pregnant woman’s uterus will gradually increase with the development of the fetus, compression of the inferior vena cava may lead to poor blood return to the lower extremities, a leg pain, and because of the increasing weight, the pressure on the lower extremities of pregnant women is also increasing, compression of the sciatic nerve may also appear a leg pain. Pregnant women need to choose the left side of the lying position to relieve the compression symptoms, sit quietly to reduce the burden on the lower limbs; 3, trauma: during pregnancy, pregnant women have difficulty moving, inadvertent scrapes and knocks when walking or standing up, resulting in injuries to the lower limbs, causing pain in one leg, so you need to observe the surrounding environment when you go out to avoid injury, the bleeding parts need to be timely anti-inflammatory, decongestion; 4, deep vein thrombosis: the level of estrogen increases during pregnancy, coupled with the long time When standing and other postures, blood flow is slow in one leg, which can easily cause deep vein thrombosis in one leg, resulting in leg pain and edema, which should be treated in time; 5, other: when a pregnant woman has arthritis in one leg, chondrogenesis of patella and other diseases before pregnancy, it can also cause leg pain, which usually has combined symptoms, and requires timely professional examination to clarify the cause and perform targeted treatment.