The phenomenon of swollen legs in the second trimester is common during pregnancy, because the enlargement of the uterus in the second trimester will lead to obstruction of venous return, and the phenomenon of swollen legs will occur. During this period, you should pay attention to proper rest, do not sit or stand for a long time, usually try to take a rest in the side lying position, when sitting for too long you can put your legs flat, which is conducive to promoting blood circulation. You should also pay attention to the adjustment of diet, pay attention not to eat too salty food, to control the intake of salt, otherwise it will aggravate the leg swelling. Attention should also be paid to checking blood pressure.