The pink soft tissue that surrounds the neck of the tooth and covers the alveolar bone tissue in the upper and lower jaws is usually referred to clinically as the dental bed, a generic term for the gums, which contain many nerves and blood vessels. Every tooth, including anterior teeth, premolars, and molars, may have a soft or hard tissue lesion with pockets on the bed. According to the characteristics of the duration of the pockets on the tooth bed, whether the pockets are accompanied by paroxysmal pain, tooth loosening, bleeding, pus overflow, hot and cold pain, spontaneous pain at night, biting pain, as well as the size of the pockets, soft and hard texture, and whether there is a fluctuating feeling, firstly, consider dental endodontic diseases: dental caries (worm teeth), chronic pulpitis, acute apical inflammation, periapical abscess, malformed central cusp, tooth invagination, severe abrasion, chipped defect, etc.: Secondly Consider periodontal diseases: periodontitis, gingivitis during pregnancy, drug gingival hyperplasia, hereditary gingival fibroma, etc.; finally consider oral mucosal diseases such as herpetic diseases, traumatic blood blisters, systemic factors hypertension or trauma including dental concussion injury, root fracture, etc. Any long bag on the tooth bed should not be ignored, must be timely to the regular hospital dentistry to avoid unnecessary dental tooth loss due to miss the best time for treatment.