Pregnant belly cold generally belongs to the normal situation, but can also be caused by improper habits or disease factors. 1, poor blood circulation: pregnancy due to fetal development, so that the uterus gradually increased, the pressure in the uterine cavity increased, resulting in the abdominal wall expansion and compression of blood vessels, so that the local blood circulation and poor local temperature of the abdominal wall decreased. After the increase of the uterus involved in the abdominal wall, so that the abdominal wall becomes thinner, the relative reduction of fat, the warmth effect is reduced, generally belongs to the normal physiological phenomenon during pregnancy. Daily life needs to pay attention to warmth and avoid cold stimulation; 2, improper diet: improper diet during pregnancy or picky eating, partial eating, resulting in malnutrition, serious cases may appear anemia, etc., can also cause abdominal chills, can be accompanied by fatigue, dizziness and other symptoms. If iron deficiency anemia is identified, appropriate iron supplements are needed under the guidance of a doctor, and attention should be paid to increasing nutrient supplementation. If a pregnant woman suffers from cardiovascular disease or abnormal thyroid function, it may also cause abdominal chills, and she needs to seek medical examination to clarify the diagnosis and treat accordingly.