If a hair dryer is too noisy, prolonged use of a hair dryer by a pregnant woman may have an effect on the hearing of the fetus. However, occasional use of a hair dryer will not affect the fetus. If a pregnant woman uses a hair dryer during pregnancy, it may adversely affect the hearing of the fetus if the hair dryer is too noisy and is used frequently. However, if a pregnant woman does not use a hair dryer frequently and the noise level of the hair dryer is low, occasional use of the hair dryer will not have a serious effect on the hearing of the fetus. Pregnant women can try not to use hair dryers after washing their hair, hair can be dried naturally or in the sun, but if the hair is long and difficult to dry, you can choose a low noise hair dryer, so as to avoid the hair not dry for a long time so that the pregnant woman will get cold and flu.