The flesh inside the incisors is the lingual gingiva of the incisors, and the swelling that occurs there may be caused by acute gingival papillitis, apical periodontitis and other diseases, as follows.
1. Acute gingival papillitis: it may be caused by mechanical or chemical stimulation of the gingival papilla, such as food impaction and stimulation of food fermentation products, inappropriate use of toothpicks or other appliances for picking teeth, hard food puncture, sharp edges of the neighboring caries, overhanging of fillings, edges of defective restorations, and the tip of the denture’s ferrule.
2. Periapical periodontitis: inflammation of periapical tissues caused by infection, acute periapical periodontitis in the subperiosteal abscess stage, gingival redness and swelling, flattening of the migratory grooves, in the submucosal abscess stage, apical area of the mucosal swelling is limited, hemispherical bulge.
There may be other reasons for the swelling of the gingiva on the lingual side of the incisor, if the above symptoms occur, it is recommended to go to the hospital in time to receive early professional treatment.