Swelling in the bed of the tooth may be due to the following two reasons: First, apical periodontitis, the tooth has undergone apical periodontitis, the inflammation penetrates the alveolar bone, forming a swelling at the gums, and this situation requires the patient to go to the hospital in time for the root canal treatment of the affected tooth. Through effective root canal treatment, the inflammation can be completely eliminated, curing the apical periodontitis, the symptoms of swollen gums will disappear. Second, gingivitis, gum tissue due to plaque, calculus, bad restorations and other local factors, resulting in inflammation of the gums caused by the symptoms of swollen gums, this situation requires patients to carry out periodontal treatment in a timely manner, the whole mouth cleaning to remove undesirable oral stimuli. Inflammation of the gums will be eliminated in a week or so, and the symptoms of gum swelling will disappear.