Distinguishing it from other types of patients, pregnant women with leg cramps in their sleep can visit an obstetrics and gynaecology department. As a woman slowly gains weight during pregnancy, she can only choose to lie on her side due to her pregnancy, and holding this position for long periods of time can trigger passive muscle contractures. In addition, the increased load on the body can fatigue the body, especially the legs of the lower limbs, resulting in a local accumulation of metabolites and a decrease in calcitonin secretion in women during pregnancy, which can lead to foot cramps and can also be seen in the endocrinology department.