Painful cramps in the belly of a pregnant woman may be caused by cold or walking for too long a distance and too long during the day. In addition, hormonal effects in the body cause muscle and ligament relaxation in pregnant women, and calcium deficiency may also cause calf cramps. It is recommended that pregnant women take appropriate calcium supplements, eat more calcium-rich foods, reduce the distance and time of walking, and maintain a relaxed mood. It is not recommended to use medication for painful leg cramps. It is best to use hot towels or warm water baths, and if necessary, ask an experienced doctor or family member to help give local massage, which can effectively relieve muscle cramps. When sleeping, elevating the feet or placing them on soft pillows can promote blood return and relieve muscle spasms.