The causes of toothache in pregnancy include dental caries, gingivitis, pulpitis, etc. Treatment is based on conservative treatment, which can be relieved by general treatment, medication and surgery. 1. Dental caries: During pregnancy, pregnant women may prefer to eat sweet foods, and then neglect oral hygiene, resulting in dental caries and toothache. It is recommended to reduce the number of sugary foods, do a good job of cleaning the teeth, and if caries cavities have formed then need to be filled and repaired, but usually choose to do the treatment in mid-pregnancy. 2. Gingivitis: when pregnant, estrogen, chorionic gonadotropin secretion increases, and pregnant women’s immunity decreases, so that the gingival capillaries dilated, curved and other problems. This can easily give germs a chance to take advantage of, inducing gingivitis. If you find obvious irritating factors, you can carry out periodontal scaling and rinse the gingival pockets with a certain proportion of hydrogen peroxide to relieve tooth pain. 3. Pulpitis, periapical inflammation: In life, bacterial infection, physical stimulation, chemical stimulation, etc., may induce pulpitis, pulpitis further development will lead to periapical inflammation, not necessarily caused by pregnancy. For this case, pulp opening and drainage is an option. If it occurs in early pregnancy, root canal treatment can be performed in mid-pregnancy; late pregnancy can be treated after delivery. Pregnancy toothache is special, the treatment is based on conservative treatment and symptomatic relief, it is recommended to consult a doctor as early as possible and follow the doctor’s instructions for treatment.