After a cramp, bend the leg on the side of the cramp, then pull the toes apart and break them straight, repeating the above actions until the symptoms ease, taking care not to move roughly. If other abnormal symptoms occur, seek prompt medical attention. Pregnant women should pay attention to rest to prevent muscle cramps caused by overload; pay attention to their diet and improve their nutritional structure by eating foods rich in vitamin D, such as cod liver oil and animal liver; and pay attention to keeping warm when sleeping to prevent foot cramps caused by cold.