The increase in weight puts a strain on your back and legs, so there may be pain in the back and varicose veins. Regarding the back pain should always consult your doctor who will advise you how to facilitate and recommend special massage.
If pregnant spends a lot of time on your feet, you can purchase special bandage. However bandage advised not to wear a long time — a maximum of three hours.
For back pain have to do special exercises for pregnant women (after a doctor's approval) to constantly monitor your posture, wear comfortable shoes with low heels. Good opportunities for swimming and make regular walking.