Pregnancy cramps are spasmodic muscle pains in the lower limbs of pregnant women, which are often referred to as cramps, especially after the fourth month of pregnancy. This symptom is mainly manifested by the sudden occurrence of muscle spasmodic pain in the lower leg area during the process of straightening the legs when the pregnant woman is resting at night, and in serious cases, it is even accompanied by toe twitching, which affects the sleep of the pregnant woman with unbearable pain. This symptom is more obvious if the pregnant woman is too tired from walking too much during the day, or if she is stimulated by the cold while resting at night. The cause of pregnancy cramps is mainly related to the lack of calcium in the body of pregnant women, so you can eat more food with high calcium content, such as milk, shrimp, soybeans, etc. to supplement calcium, but also pay attention to the combination of work and rest, usually pay attention to keep warm.