Periodontitis can also cause toothache, mainly severe aggressive periodontitis, when the alveolar bone resorption reaches the apical 1/3, there will be bacteria through the deeper periodontal pockets, from the apical invasion of the nerve to the nerve of the teeth to appear retrograde pulpitis, then the patient will have a painful feeling, and may be complicated by periodontal abscess. The patient is unable to chew at this time, and may even cause interstitial infection leading to facial swelling. In common chronic periodontitis, patients basically do not have any discomfort, but only bite weakness and spontaneous bleeding. Once severe aggressive periodontitis occurs, it is important to go to the dentist in time, so that the doctor can carry out perfect periodontal treatment, as well as root canal treatment, to preserve the teeth as much as possible. For more complicated teeth or even loose teeth, you can also consider extracting the tooth and then restoring it later.