Fear of cold in the second month of pregnancy may be caused by cold air stimulation, early pregnancy reaction, anemia, upper respiratory tract infection, hypothyroidism and other reasons. 1. Cold air stimulation: in the second trimester, if the pregnant woman is in a low temperature environment for a long time, or stimulated by cold air, it will lead to excessive heat dissipation, insufficient heat production, and fear of cold. 2. Early pregnancy reaction: the hormone level of the pregnant woman’s body in the second trimester of pregnancy will undergo certain changes, and some pregnant women will be afraid of cold, dizziness, nausea, loss of appetite, fatigue and other symptoms, which is a normal physiological phenomenon. 3. Anemia: If pregnant women suffer from malnutrition and folic acid deficiency, they will develop anemia in the second trimester of pregnancy, resulting in a decrease in the number of red blood cells and a decrease in hemoglobin, which is mainly manifested in symptoms such as fear of coldness, fatigue, dizziness, and so on. 4. Upper respiratory tract infection: If pregnant women are infected with respiratory syncytial virus and coxsackievirus in the second trimester of pregnancy, it will cause upper respiratory tract infection, with symptoms such as chills, limb pain and nasal congestion. 5. Hypothyroidism: If affected by surgery, medication, autoimmune diseases and other factors, the thyroid gland produces or utilizes a decline in the thyroid gland, resulting in hypothyroidism, so that the pregnant woman appears to be afraid of the cold, accompanied by a decrease in appetite, memory loss, fatigue and other symptoms. Therefore, if a pregnant woman is not feeling well, she should go to a regular hospital in time, and under the doctor’s diagnosis, according to the specific condition, targeted treatment.