Pregnancy itself does not cause fox odor to appear, but during pregnancy women’s fox odor may be aggravated, which is mainly related to the endocrine glands of women are easily affected during pregnancy. Fox odor is an unpleasant odor emitted from the folds of the armpits. When the sweat glands on the surface of the human armpits secrete sweat containing lipids or proteins, they can be decomposed by the bacteria on the surface of the armpits to produce unsaturated fatty acids, thus producing the odor. Pregnant women have a high metabolism and tend to sweat a lot leading to the growth of bacteria, when sweat and bacteria, fox odor will be aggravated, and body temperature increases to make this symptom more obvious. At the same time, pregnant women are sensitive, irritable and emotionally volatile, which can affect the endocrine system and may aggravate fox odor. It should be clear that fox odor does not affect the health of the mother, not to mention the fetus, and can be restored after delivery, so do not worry too much. It is recommended to improve the lifestyle of pregnant women to take a bath or wipe the folds of the skin to ensure that the body is clean and dry, and to develop good eating habits, regular rest and rest, and regular living to avoid endocrine disorders, increasing sweat secretion and increasing fox odor during pregnancy.