Peripheral edema is swelling of your lower legs or hands which could be because of standing or sitting for too long. It is common in older adults and pregnant women, but it can occur at any age. To relieve the swelling elevate your legs (or arms) above the level of your heart a few times a day. Sleep with a pillow under your legs at night. Exercise regularly and take breaks to move around, if you have to sit or stand a lot. Reduce your intake of salt. However, it is important to consult a doctor to identify the reason behind it.