The fear of cold before menstruation is caused by a series of changes in estrogen and progesterone in the body before menstruation, in addition, the body’s resistance decreases before the onset of menstruation, and the phenomenon of fear of cold easily occurs, which is a physiological symptom, mainly manifesting cold hands and feet, and also headache, dizziness and other phenomena. The fear of cold after pregnancy may be related to the pregnant woman’s constitution, also related to endocrine disorders, but also related to pathological reasons, the fear of cold after pregnancy is manifested in the blowing fan, blowing air conditioning when the cold, drink hot water, add clothes after this symptom can disappear. If you get cold all over your body and experience other discomforts, you cannot be sure whether it is a premenstrual symptom or a symptom after pregnancy. You need to go to the hospital to have your blood tested for HCG in order to determine whether you are pregnant or not, and you cannot be sure from the symptoms alone. You should pay attention to exercise and keep warm at the same time.