There are many reasons for bubbling between teeth, such as gingivitis, periapical periodontitis, periodontal abscess and so on. 1. Gingivitis: Gums infected with pathogenic bacteria, due to inflammation stimulation, can show abnormal phenomena, resulting in bubbles between the teeth. 2. Periapical inflammation: Periapical inflammation is usually due to severe caries infection of the nerve, due to necrotic material to the apical position of the exudate, can be formed in the apical part of the fistula, resulting in the phenomenon of bubbles in the gap between the teeth. 3. Periodontal abscess: bubbles between the teeth may be due to periodontal abscess, mainly due to the development of periodontitis to the late stage, the local infection is more serious performance. There are many reasons for the bubbles in the teeth, after the symptoms are recommended to go to the hospital in a timely manner to improve the examination, after a clear diagnosis to take standardized treatment, do not ignore the symptoms, to take it lightly.