If pregnant women can brush and rinse their teeth carefully during pregnancy and maintain oral hygiene, pregnancy will not affect their teeth, however, many pregnant women will have toothache symptoms, and its causes are mainly the following: First, pregnancy will affect the periodontium, during pregnancy due to changes in hormone levels in the body will make the gums red, swollen and bleeding, and the sensitivity of the gums to plaque is enhanced, making the gums extremely susceptible to In this case, as long as the amount of plaque in the mouth is carefully controlled, the probability of periodontitis will be significantly reduced. Secondly, women who are pregnant are prone to periodontitis, which is caused by the presence of obstructed wisdom teeth in the mouth and changes in hormone levels in the body during pregnancy, which can easily inflame the soft tissues around the wisdom teeth and cause redness and pain at the far end of the tooth bed. If this inflammation occurs during pregnancy, only conservative treatment can be done and the pericoronal area can be rinsed to relieve the swelling and pain. Thirdly, women may have pregnancy vomiting during pregnancy, and may have nausea when brushing teeth. Since not brushing teeth carefully will make food residue accumulate on the tooth surface, which will easily lead to tooth decay.