There are many reasons why pregnant women sweat: 1, pregnant women may sweat because they are in pregnancy, the hormonal secretion of women in pregnancy fluctuates, which can lead to hyper metabolism and accelerated metabolic rate, which leads to excessive sweat secretion by human sweat glands, resulting in sweating in pregnant women. 2, pregnant women may also sweat because of plant nerve dysfunction. The common symptom of plant nerve function disorder is excessive sweating, usually need to take vitamin B1 and vitamin B2 to regulate. 3, pregnant women sweating is not excluded due to deficiency of qi and blood caused by deficiency of qi and blood pregnant women often appear weakness, dizziness, night sweats, muscle weakness and other symptoms. Usually, if the sweating is caused by deficiency of Qi and Blood, you need to take the appropriate Chinese medicine for adjustment.