For the situation of buttock cramps in late pregnancy, one is seen in late pregnancy calcium deficiency, which leads to spasm of the buttock muscles, which will cause obvious buttock cramps. Then there is the rapid increase in weight in late pregnancy, which will cause excessive stress on the buttock muscles during activities, resulting in strain and spasm of the buttock muscles, which will also cause obvious buttock cramps, especially when resting in bed, the symptoms are more obvious. There is also the case of cold, which can easily lead to contraction and spasm of the buttock muscles, which can also lead to buttock cramps.