The reason for toothache in pregnant women is mainly because during pregnancy, the estrogen and progesterone of pregnant women are higher than normal, so the intraoral environment of pregnant women will be more sensitive to local stimuli. If the oral care of pregnant women is not done properly and the inner environment of the mouth is not clean, plaque, calculus and food residues will remain on the teeth, and local stimulus factors are more likely to induce oral diseases and cause toothache, such as dental caries, pulpitis, periodontitis and other diseases will have pain and more serious symptoms. Since it is during pregnancy, it will be more tricky for doctors to deal with it, and it is easy to induce the risk of life of pregnant women and fetuses. Therefore, during pregnancy, you must keep your mouth clean, brush your teeth properly and rinse your mouth regularly to reduce local stimulation in the mouth.