Late pregnancy toothache can be treated by improving diet, keeping the mouth clean or medication (e.g. acetaminophen). 1. Improve diet: Once a pregnant woman has toothache in late pregnancy, it is best to eat a light diet, consume more fresh vegetables, drink more water, and avoid spicy and stimulating foods. 2. Keep the mouth clean: pregnant women in the late stages of pregnancy, need to try to keep the mouth clean, brush your teeth every day, for the teeth should not be cleaned, you can use dental floss to clean. 3. Medication: If a pregnant woman has a toothache in late pregnancy, she can follow the doctor’s instructions to reduce inflammation and pain through acetaminophen, ibuprofen and other drugs. Once a pregnant woman finds herself in late pregnancy, she should consult a doctor in a timely manner, under the guidance of the doctor to improve the relevant examination and standardized treatment, do not blindly use medication, so as not to have an adverse effect on the growth and development of the fetus.