Breastfeeding toothache is likely to be caused by the following reasons: First, the patient’s own oral cavity exists in a very deep caries, but not timely filling treatment, because of breastfeeding resistance is low, induced by pulpitis caused by toothache. Second, wisdom teeth pericoronitis, also because the patient in the lactation period, hormone level disorders, low resistance, will cause itself to have blocked wisdom teeth inflammation, so it is recommended that during the preparation for pregnancy to actively remove the blocked wisdom teeth. Third, periodontal abscess, if the patient himself suffers from chronic periodontitis, there are deeper periodontal pockets in the mouth, it is very likely that the attack in this period into periodontal abscess.