The leg cramp usually occurs in the calf gastrocnemius muscle, that is, the calf stomach. At this time, the pregnant woman should straighten her knee joint and force the palm of her foot to make the back of the foot as close to the calf as possible, in order to stretch the calf gastrocnemius muscle, when stretching, pay attention to the force should not be too violent, the force should be even and slow to avoid straining the muscle, when the cramp stops, the muscle can be properly massaged, hot compress to relax the muscle and relieve pain.