The main reasons for cramps in the toes of pregnant women include the following aspects: First, pregnant women need a very large amount of nutrients, not only the pregnant woman herself needs nutrients, the fetus needs a lot of nutrients, coupled with a poor diet or indigestion of pregnant women leading to nutritional deficiencies, such as the lack of calcium ions, the lack of potassium ions, which will lead to muscular dysfunction, resulting in cramping symptoms. Secondly, the uterus enlarges, and the pressure in the abdominal cavity also increases, which leads to poor blood return, and the venous return of the lower limbs will also be affected. Poor blood circulation leads to muscle dysfunction, resulting in cramping symptoms. Thirdly, due to the increased pressure in the abdominal cavity will lead to an increase in the load on the waist, which will produce the corresponding nerve root pulling or compression symptoms, resulting in muscle dysfunction in the innervated area, leading to symptoms of cramps in the lower limbs. With the increase in fetal weight, the weight of pregnant women is increased, the lower limb load will increase, resulting in muscle strain or injury, resulting in muscle dysfunction leading to cramps.