What is the cause of pregnant women's leg swelling?

Pregnant women with leg edema, is a common phenomenon in the second and third trimester of pregnancy, is due to uterine enlargement, weight bearing caused by both lower limbs. But if pregnant women with pregnancy hypertension, will also cause leg edema. It is recommended to soak feet with hot water to alleviate edema. If pregnancy hypertension, if necessary, also take antihypertensive treatment.